I guess I'll start this one off. I frequently play at an open blues jam at a club in Philadelphia, PA called Warmdaddy's. The jam is held every Tuesday night. There is no cover to get in. There is no food or drink minimum. It is totally conceivable that a musician could just walk in, have a seat, and listen to music without spending a dime (this rarely happens since most order a drink or two and the food there is pretty good -- but it's nice to know that its possible). The place draws a decent sized crowd, but rarely gets so crowded that you can't get a seat at a table or at the bar. The jam attracts players of all ages and at all levels of ability. There is no fee to play. And most importantly, the people running the jam and the crowd are always very encouraging and appreciative of the people who get on stage to perform.
:cool: