A local session in my town has been stifled by the rulemakers and session etiquette police. Being held in a pub, it's only natural for people to want to talk, including (if it's not to loud of course), the musicians. The people who like to think they're in charge of the session don't like talkers, people who don't know the tunes but who are learning, people who don't listen to their jokes intently etc etc.

Well, many musos upsticksed and went to another local, where we let anyone join in, you can talk (it is a social occasion too), you can start any tune you want, are free to sing what you want and as long as you are enthusiastic and friendly are very welcome. In other words, much the same as The Shambles mentioned above. Shushers are treated with (loud) scorn and contempt, and much questioning of parentage. And members of the public can sit where they want even if it means some of the musos have to stand up (first come, first served). Suffice to say our sessions are fun, informal, and often the room is full.