Many Chassidish shuls have kiddush clubs, it’s not something exclusive for Modern Orthodox shuls. There are several shuls near my parents which are known for being basically hangouts for tuna beigels and other near-off the derech Chassidim. They all have unofficial kiddush clubs.
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.