Looking for a great inexpensive dinner for about 8 people in downtown Northampton, MA. I've been to town a few times, but haven't tried many restaurants. Casual, funky, fun bistros, New American, or ethnic would all fit the bill nicely. Nothing too fancy/fussy - we're looking for a great place for friends to enjoy a delicious, filling meal, comfortable atmosphere, and good converstaion, with entrees under $20. Any suggestions?