The Jam has a nice line-up of fun and original old-timey bands tonight at 9 p.m. ($5). Belles of the Levee play a mix of pre-World War II jazz tunes written for low-lit parlors, celestial dance halls and granges alike, while Dead Bird Son is a bluegrass hybrid band that walks on gilded splinters down the floorboards of every barn in twilit bat-hour heaven. In short, you can take a trip to the gut-string era while enjoying modern amenities on this inexpensive rainy evening cruise.