I went with a bunch of friends, including Kyberneticist to the DC Blues Society's monthly blues jam at HR-57. We were pleasantly surprised to note that there was no cover charge, and got to enjoy four hours of great blues music with friends and tasty Southern food.
Needless to say, everyone put the $6 that we had planned on for a cover into the box to support the Society. Cindy even bought a hat, and filled out a membership form.