Yes, 'cool' is relative, but since 3dB specifically mentioned Black Betty, I would assume he wants songs similar to that; ie hard driving electronica/bass type music with an infectious (but repetitive) beat.
So here are a few of my suggestions:
Planet Patrol - Play at Your Own Risk, Cheap Thrills, Danger Zone, Didn't Know I Loved You (Till I Saw You Rock n' Roll).
Trinere - all of her hits. (See Trinere & Friends Greatest Hits CD on TowerRecords.com).
Shannon - Give Me Tonight, Let The Music Play, My Heart's Divided.
Pretty Tony - Fix It In The Mix, Jam The Box
If you like Black Betty, you just may like that kind of music. I love it as it is the type of music they play at the skating rink and I loved skating as a kid (and still do although I am soon to be 'middle aged'). Planet Patrol is particularly good for testing the bass capabilities of a system.