They never stop.
It's really important to support this stuff with your dollars, not because we need to make Gore rich (the money isn't going to his pocket anyway) but because it proves there's a market and an audience and a political constituency for fact-based reality.
So, reprinting from below:
Get your tickets before they're gone. Some shows sold out on Wednesday for opening night in Hollywood, but Santa Monica is still an option.
New Yorkers can get tix to AMC Loews Lincoln Square or Landmark's Sunshine Cinema. It looks like they just added another screen so it'll be running on three.
The rest of you can find the opening date near you here.
...New Yorkers can also see Gore on Thursday at Town Hall. Commenter AJS says tickets are almost gone.