On the issue of 'dom clothes', it is actually a rule at the munches in this area that you are not allowed to dress 'scene' in anyway. At least not blatantly. By this I mean: no leather, no PVC, no specific costumes. Just what you normally wear day to day. You can get away with a collar for the slaves but these need to be discrete 'day collars' rather than heavy play collars. The organisers basically do not want to draw attention and, as you say, 15 school masters is a little OTT

Sounds like you had a bad experience. Not been to a munch myself (the local ones here are all on days I can never make) but have wanted to for a while.