The menu I had had mushrooms. They do try to accommodate allergies I think it would be worth a call to ask

I’m the same way! I have found barre and pilates (I do mat) are similar to yoga in that the instructors are encouraging but allow you to go at your own pace without a lot of pressure.

Bethesda bagels have them, they’re pretty solid it’s actually my usual order. No sesame seeds on them. They also usually have marbled rye bagels.