Funk-ish Julia Delaney. Chords are | Dm F C G | D F C / | for the A and then something down (Dm/C) for the B. Here's me playing the left hand part while holding Anna with my right hand: mp3.
Johnny B Goode. To square up, you play "Deep down Louisiana ... named Johnny B. Goode" as the A part and then jump ahead to "Go go" for the B part. End the B part by pounding on the V. Keep an eye on the tempo, it wants to go too fast to dance.
Zydecoish far from home. Play half time, AB.
Something weird with Fair Jenny's, with a walking bass, kind of groovy.
Play I V vi IV | I V IV IV with a whole series of quotes, a new one every 16 bars (half a tune). Like "take me home country roads / let it go (frozen) / let it be / wagon wheel" (more? you've got a friend? don't stop believing?). Here's an example mp3.