Jon Stewart (Getty Images)

It’s hard to believe Jon Stewart has time to spare before the presidential election, but for the fourth year running, he’s hosting his Night of Too Many Stars benefit, an apolitical gathering devoted to raising money for autism research. Funny people (Tina Fey, Tracy Morgan, Seth Rogen, Jerry Seinfeld) and, well, untraditional comedians (Julianne Moore, Bill O’Reilly, Katy Perry) are appearing to tape a live sketch show that will air on Comedy Central on October 21 ... Earlier in the day, the Public Theater invites neighbors citywide to an open house to showcase its revamped and refurbished (to the tune of $40 million!) Astor Place home, with sneak peeks at upcoming productions including the Alison Bechdel adaptation Fun Home. Anyone planning on cabbing it, beware: a stretch of Lafayette Street’s closing down for the party!

Night of Too Many Stars, Beacon Theatre, 2124 Broadway, 7:30pm, tickets and information can be found at comedycentral.com/shows/night-of-too-many-stars; Public Theater block party, Lafayette Street between Astor Place and East Fourth Street, 12pm-5pm, open to the public.