How Would You Promote a Band?



I've been talking to a friend about this who's in a Ska/Punk/Funk band in the DC area (Maryland burbs). Long story short, the live music scene is pretty barren, aside from a few biggish bars.

The good news is these bars have massive email lists, and I imagine getting them to mention your show would work wonders for getting people to come out.
 
Guys, awesome input, for real. I wasn't sure how well this topic would go over but you all surprised me with some cosmic info. Thanks to everybody. I've certainly taken notes.