
Seriously, though:
I'd second Ball Crusher. And Still Got The Blues.
Crossfire (SRV).
Bottle Up and Go (Sleepy LaBeef).
All Around the World (James Booker).
Boogie Chillun (John Lee Hooker).
Black's Ball (J.B. Hutto & The New Hawkes).
And, if your band can pull it off:
Bridge of Sighs (Robin Trower). (It's easy to really suck at this one, though, and people who know it tend to have high expectations.)
Blues: Not my favorite genre anymore, but there's a reason it's still popular with some people.