He's at Big Planet Comics at 15th & U St, NW from 6-7 signing books and then performs at 8 p.m. at Riot Act Comedy Theater, 801 E St. NW. $15. http://riotactcomedy.com (202) 697-4900.
I'll be at Big Planet, the first time I'm visiting that store.
Updated - Eden Miller interviewed Piraro for her Comicsgirl blog