Underground comedy can be hit or miss, though that's unsurprising when you consider how out of touch with pop culture mole people really are. For underground comedy that's all hits, check Humorboom.
From two standup-and-comers who've been on stages all over the city (Comedy Cellar, UCB, Caroline's...), HB's the comedy equivalent of an underground supper club, changing headliners each month, keeping the venues a secret, and specifically tailoring it all to 20- and 30-somethings, as they've already proven to have impeccable taste when it comes to e-publications chock-full of hilarious mole people jokes.
What began as a "break from the ubiquitous middle-aged man comedy" typically found in the city has evolved into a unique and intimate way to showcase some of its top young jokesters, accomplished during a tight (less than two hours) set loaded with only the funniest comedians, because other "shows suck" (maybe because they took all of the top young jokesters?).
Wannabe attendants can sign up for a slot on their site, and, should they make it, they'll receive notification about one week before the show informing them of the When, Where, and Who, which'll often include "huge stars" like Daniel Tosh and Chelsea Handler, but not Louie Anderson, who improbably has to get even huger.
Usually there's a waiting period to get on the list, but since reading this makes you awesome, half of the next show is reserved just for Thrillisters, though that's unsurprising when you consider anyone who doesn't subscribe to such an awesome, mole-person-filled e-publication probably lives underground.