I went on Sunday and got there 1/2 hour before the curtain for David Wilmot/Domhnall Gleeson's last, and I'm pretty sure you can get there
anytime before curtain and get a ticket. They seem to sell whatever's left in the lowest price range in the rear mezz (whatever row that starts at...F or something?). The entire mezz was empty on Sunday (I'm not exaggerating when I say there were probably only 15-20 people up there). But, even though it was a small crowd, the audience was really into the show. Lots and lots of laughing, and just all around really on the ball. A nice way to send David and Domhnall off, I'd say!
But when did New Hampshire become--Such a backward wasteland of seatbelt hating crazies?...I mean, only 40 people actually live there. The others are just visitors who come for the tax-free liquor and three inches of novelty coastline. John Hodgeman on The Daily Show (1-30-07)