Funniest story was once when my brother overslept and ended up at the 9:30 shteibel minyan. Halfway through Chazaras Ha’Shatz Mussaf he realizes that there’s barely a minyan in shul. The rov stops the chazzan for a second, goes to a nondescript door in the back and bangs on it going “Nu? Nu?”. Door opens to a room packed with men, kugel, cholent and whiskey.
Oh do I want to join that shul