Photo by Mike Maguire.

SELF-DEFENSE: Learn simple but effective Ju-Jitsu technique in this class led by Certified Renshi Instructor, Guy Haymon. The class will be geared toward women, but men are welcome to join. Mt. Pleasant Library (3160 16th Street NW) 7 p.m. Free

DATING: Drink unlimited champagne and meet single folks when The Offline Society hosts its Champagne Preview Party. EatsPlace (3607 Georgia Avenue NW) 7 p.m. $20

GHOSTS: In The Great Lieutenant Sprinkle Didn’t Save Me, “part thriller, part mystery, and 100% DC ghost story,” a young couple begins to experience supernatural forces in a police station turned law office. CAOS on F Gallery (923 F Street NW) 8 p.m. $8-30 Runs though 5/17