Hi lil' girl. "Munch" isn't a thing I know much about. But it sounds like a great idea. The fact that it's happening in a "public" place. Makes it quite secure, as it's no danger for to suddenly end up in some kind of scene or game that you don't want to.
Over here we've got clubs and I can assure you that I was very scared the first time I went to one - Back in the 70th BdSm wasn't as accepted as to day.
But my experience are that clubs always are very friendly towards new people and makes sure that they feel accepted and welcome.Even later on when I began to drive around to make Bondage-shows. It's always made sure that I felt welcome.
Most people who use time and energy to get clubs etc. working are by my experience nice and friendly people.
So I can only advice you to go and I'm even sure that yo'll have a good time. Just the fact that you're able to talk to people with the same interest without being looked strange at, is great.
I wish you the best of luck. Hugs