It’s been more than 20 years since New York R&B trio SWV dropped its huge debut, It’s About Time. Formed in an era when the female R&B group thrived, SWV made its way to the top on the strength of songs like “Can We” and the Michael Jackson–sampling remix of “Right Here.” Tragically, the group split in 1998, turning its attention to things like school and parenthood. But after years of silence, Coko, Lelee, and Taj reunited in 2005 and last year released I Missed Us, their first group effort in 15 years. They even racked up a Grammy nod for their cover of Patti LaBelle’s classic, “If You Only Knew.” When they perform at Howard Theatre tonight, they’ll bring two decades of hits with them, most likely for a crowd that grew up listening to their songs (and possibly a few kids who were conceived to them). When SWV plays its signature single “Weak,” it’ll probably trigger all the same feelings it did when you slow-danced to it at senior prom.SWV performs with Lahla-Hadiya at 8 p.m. at the Howard Theatre, 620 T St. NW. $29.50–$35. (202) 803-2899. thehowardtheatre.com.