EVENT: Tonight, as part of the recurring Upstairs at the Square event, Nellie McKay plays tunes from her latest, Obligatory Villager and host Katherine Lanpher talks with author and filmmaker Antonio Monda. Monda's new book Do You Believe? Conversations on God and Religion will hit shelves soon -- and tonight he'll relay the discussions he had about religion with folks like Spike Lee and David Lynch.

7pm // Barnes & Noble [33 E 17th St] // Free

MUSIC: Head over to Union Square for a free sonic treat tonight, Grizzly Bear will be performing at the Virgin Megastore before taking a bit of a break from playing out. Catch 'em while you can!

Listen: On a Neck, On a Spit.mp3

7pm // Virgin Megastore, Union Square // Free

SCIENCE: Following up their taxidermy event last Friday, the Secret Science Club is back at Union Hall for their regular monthly science extravaganza. This time around they're exploring the world of...something we don't totally understand, with chemist Ronald Breslow -- who has created over 1,000 new chemical compounds! He'll be lecturing on "SAHA," a recently approved cancer-fighting drug. This month's specialty cocktail: the Bunsen burner!

7:30pm // Union Hall [702 Union St, Brooklyn] // Free

THEATER: Bad Jazz is a “gleefully raunchy satire” about a company of desperate actors falling to pieces under the boot of a megalomaniacal director. Somehow the lines between reality and performance begin to blur for the bewildered thespians as their production staggers toward completion. The poster for the play, which has yet to open officially, advertises “sex, drugs & bad jazz”, but since there doesn’t seem to be any actual jazz in the show, we’re left wondering about the promise of sex and drugs as well. Still, it’s fun to laugh at actors. – John Del Signore

8pm // Ohio Theater [66 Wooster St] // Tickets cost $25.