You can look for movies in your area at Yahoo! or Fandango.
Ratatouille is on Starz at 8:00 p.m. If you don't have the premium channels, you can watch Henry: Portrait of a Serial Killer on IFC. It's not my cup of tea, but some folks seem to like it.
If you're into drone rock, Boris is playing at the Great American Music Hall. If you're into mussy-haired whining, Conor Oberst will be at Bottom of the Hill.
Kevin Nealon is at Cobb's tonight. I didn't know he did stand-up, but he's probably pretty funny live.
You could take a drive to the coast and watch the stage adaptation of The Full Monty.
You have options. If you find yourself watching a Zito/Peavy match-up tonight...I don't think modern science can cure you. But keep fighting. There will be a pill or operation for your kind of sickness some day.