Photo by Mike Maguire.

CRAZIES: In honor of March Madness, this month’s A People’s Choir will feature songs related to crazy madness. Sing along to Britney Spears, Green Day, Beyonce, and more. The madness happens at Stetsons. (1610 U Street NW) 7:45 p.m. Free

HABITS: If you have any crazy habits that you’ve been trying to break, join Gretchen Rubin, author of the New York Times bestsellers The Happiness Project and Happier at Home, to discuss strategies for making good habits and breaking bad ones. Sixth & I (600 I Street NW) 7 p.m. $15-40

GUNS: Team 26, a group of 26 cyclists riding from Sandy Hook to the Capitol to remember victims of gun violence, hosts a discussion on “Actions to Reduce Gun Violence.” Busboys and Poets (1390 V Street NW) 6:30-8:30 p.m. Free