Here's another killer website that lists great music in the Boston area:
Twisted Village
Tonight we are going to see Central Artery Project (Chris Allen, trombone; Charlie Kohlhase, saxophones; Curt Newton, drums; Dave Choi, bass) / Nate McBride Quartet (Taylor Ho Bynum, cornet; Charlie Kohlhase, saxophones; Curt Newton, drums; Nate McBride, bass.) mim series presentation: Artists-At-Large Gallery.
If you are there tonight, just use the adjective "impossible" in conversation during set breaks. I will be listening for it.