MC Hammer. (Matt Sayles / AP)

— MC Hammer dining at the Hamilton very late Sunday night — near midnight — with a party of six that included Silicon Valley investor Ron Conway. Chardonnay, roasted olives for the table to share. Hammer went vegetarian with a grilled portobello sandwich. Unclear what brought them to town, but the two have partnered on various advocacy/political causes before. (Update 4/24: Oh, here’s why he was in town.)

Earlier: Hey, isn’t that . . . ?: Michelle Obama

More Hey, isn’t that . . .? and even more sightings. . . Had a sighting? Share it at reliablesource@washpost.com.

More Reliable Source: Delta Gamma letter; Barbra Streisand; John Roberts; Jennifer Hudson; Correspondents’ dinner; Reese Witherspoon