Hear those sweet sounds as you leave your mid-town work, lobbyists? Those are the Sounds in the Square, Farragut Square Park, to be exact, at Connecticut Avenue & K Street, NW. Thursday in June and July, the Golden Triangle Business Improvement District will present their concert series. Tonight’s jam is Jah Works, a (you guessed it) reggae band. Upcoming concerts include a salsa band and a Dave Matthews Cover Band. At the end of the music-times, there will also be prize giveaways. Reggae and free things? Oh, Golden Triangle, you know what I like…