Studios take guest teachers constantly. Workshops, one-off classes, a Sunday afternoon slot in a room that would otherwise be dark. The reason you do not have a guest slot is almost never that somebody said no.
It is that the ask was never actually read.
The message is competing with a broken boiler
Picture who receives it. A studio manager, or an owner who also teaches nine classes a week, standing at reception between a 10:30 and a 12:00, phone in one hand, dealing with a member whose card was declined and a plumber who has not turned up.
Into that arrives a message with three paragraphs about your training lineage and an attachment called TeachingProposal_v3_FINAL.pdf.
Nothing about that message is wrong. It is just unreadable in the conditions it arrives in. The teachers who get guest slots are not better teachers. They send a message that survives being read standing up.
What the studio is actually weighing
Not whether you are good enough. A guest class is small for them. It gives them something to post in a quiet week, it brings in whoever practices with you nearby, and it gives their regulars something different without changing the timetable. If it goes badly, it is one class and it is over.
What they are weighing is whether saying yes creates work.
Work means: a scheduling conversation with three rounds of back and forth, having to design the offer for you, having to chase you for a description and a photo, having to explain to their regular Sunday teacher why someone else is in the room, and having to fill it themselves.
Everything below is about removing work. That is the whole method.
Send this instead
"Hi Katja, I'm Lea. I teach pranayama and slow flow in Berlin, currently at The Lab on Wednesdays. I'd love to teach a class or a short workshop with you sometime if that's ever useful. Everything I do is here: namaspot.com/leaasja. No reply needed if it's not a fit."
Sixty words. Five things in it, all deliberate.
Their name. Not "Hi team." Find the actual person. It is usually on the studio's own site under the schedule, or it is whoever answers the Instagram messages. A message addressed to nobody gets handled by nobody.
Who you are and where you already teach. One existing studio does more than any certification. It says another studio already checked you and kept you. Almost no teacher publishes a certification number anyway, and no studio has ever asked for one at this stage. Venue and lineage do that work.
A loose offer. A class or a short workshop. Do not arrive with a fully designed six-hour intensive with a name and a subtitle. Let them place you where their gap is, because they know their gaps and you do not.
One link. Not an attachment. The link has to answer every follow-up question on its own, because there will not be a second exchange if the first one requires effort.
Permission to ignore it. "No reply needed if it's not a fit" looks like it weakens the ask. It does the opposite. It removes the social debt of receiving the message, and a message that costs nothing to receive gets read to the end.
Why the PDF fails, specifically
It is not that a PDF is unprofessional. It is that a PDF is a document designed for A4 paper being opened on a phone by someone who is standing up.
Tapping it downloads a file. The file opens in a different app. The text is six point. They pinch, they scroll sideways, they give up, they tell themselves they will look at it properly later. Later does not exist in a studio.
The same information on a page that loads in one tap and can be scanned in twenty seconds gets read. This is not an aesthetic preference. It is the physical reality of how your message arrives.
There is a second problem with the PDF, which is that it is dated the moment you send it. Studios in your list close. Your Wednesday class moves. A living page you can fix in thirty seconds does not have this problem, and dated material is the single most common reason a teacher's own presence stops being useful within a few months.
What they check before answering
Assume they look you up. Assume it takes twenty to thirty seconds, on a phone, and that they are looking for three things.
Is this a real teacher who really teaches? Named studios, a named regular class, a timetable that exists. This is answered or not answered in about four seconds.
Does the style fit this room? A studio with a strong alignment-based hatha crowd and a guest teacher who mostly does loud beat-driven flow is a mismatch, and they will feel it before they can articulate it. Say what your class actually is in plain language, not in adjectives. "Slow, mostly floor-based, long holds, one guided breath practice" tells them more than "grounding and transformative."
Will this person be straightforward to deal with? This is unfalsifiable, so they infer it from the message. A short, clear, low-demand message is itself the evidence.
Timing, and the reason it matters
Six to eight weeks before you want to teach. That is the window in which most studios lock a timetable and start telling people about it.
Ask three weeks out and even a yes produces an empty room, which is worse for both of you than a no. Ask five months out and it goes into a mental folder that does not exist.
If you are traveling, say the dates in the first message, not the third. "I'm in Lisbon from the 4th to the 18th of March" is a fact they can act on immediately.
What to ask for, and what not to offer
Ask what they normally do rather than proposing terms. Most studios have a house standard for guests, and asking saves a negotiation neither of you enjoys.
"What do you usually do with guest teachers? I'm easy either way."
The common shapes are a flat fee, a split of the door after costs, or you take the door and they keep their members' credits and their app bookings. All three are normal. The split is often somewhere around 70/30 or 60/40 in the studio's favor for a class and tilted towards the teacher for a workshop, but it varies enough by city that the only honest advice is to ask.
Ask one more question while you are there, because it is the one that decides whether the day is any good.
"Who usually fills these, you or me? Happy to do my part either way."
Studios expect a guest to bring some people. You should expect the studio to tell its own list, because the studio holds the list and the app, not you. Getting that out loud in advance prevents the specific disappointment of eleven people in a room where you both assumed the other one was promoting it.
Do not offer to teach for free to get a foot in the door. It sets your number at zero for every future conversation, and studios do not value it. The one exception worth making is a genuinely new format you want to test in front of strangers, where you should say exactly that, because then it is an experiment with terms and not you working for nothing.
When there is no reply
There usually is not, the first time. That is not a rejection, it is a phone.
Wait three weeks and send one more, shorter, with something new in it. Never the same message again.
"Hi Katja, just following up once. I've added a Sunday slow flow at The Lab so I'm in your neighborhood on Sundays now if a guest class is ever useful. Same link: namaspot.com/leaasja."
Two messages. Then stop, and go and take one of their classes as a paying student instead. That is not a tactic, it is just how you find out whether you actually want to teach in that room, and being a face they have seen changes the third message completely.
The thing that gets you invited back
Turn up early, teach the class that was advertised, put the props back, and send one message afterwards saying thank you and that you enjoyed it. Then add one line.
"If it went well enough for you, I'd happily do it again in the autumn."
Most guest teachers never say that sentence, which is why most guest classes are one class. It takes eleven seconds and it is the difference between a nice afternoon and a slot you teach twice a year for the next four years.