Advisory Neighborhood Commission 1B, which covers most of Columbia Heights south of Columbia Road (click the map for a full view) is tonight at 7 pm on the 7th floor of the Reeves Center (14th and U). The agenda is on their website. Looks like a few alcohol license things, bike lanes on 15th street, plus other business.
For those unfamiliar, the ANC is an elected body that advises the city council on local issues. Their main power is to oppose liquor licenses and require places to sign "voluntary agreements," such as what sort of liquor they sell, how late they're open, and such. If businesses don't sign, the ANC can oppose their liquor license.