You'll hear a variety of songs at Jim's Country Jam. As the name suggests, the genre is largely country -- and by this, we mean Ray Price, Lefty Frizzell, Hank Williams (the real one), Bob Wills, Willie, Merle... you get the picture.
However... if it's roots are grown in the same folk / blues / gospel soil, then we consider it a harvestable crop.
Here's a link to a page with some song suggestions.
Check out this link for help in writing and reading "Texas Tabs" (number charts.)
Many people ask about the tablet computer that Jim Stringer uses at Jim's Country Jam. Most often, it's a 12" Windows tablet made by Austin's own Motion Computing. The application is call HiredGunRMS, and it developed and marketed by Music Room parent company, Telescript West, Inc.