You can't go wrong with Don Alan's Chop Cup Routine. It's a total classic.
If you're feeling particularly energetic and ambitious, try out Paul Daniels' Routine
I love watching Paul Daniels' routine (it was the first one I saw), but I don't think many people could pull it off the way he did.
Some of my faves...
Larry Jennings' seated, formal close up routine that involves a shot glass and a silk is nice. The extra props generate interest for me as a magician and I think for the audience as well. It's different from many routines in that it's not fast paced. Jim Swain does a great variation of it here:
Mark James is genuinely funny. I like his routine here:
I perform a one cup (non chop) routine for walk around restaurant magic and in my close up shows that I learned from Jonathan Kamm. Check him out here: