The Royal Diner, where Brennen and Booth (and occasionally the other characters) go to relax after work really exists in Washington - but the one in New Jersey (on Route 31 North), not the District of Columbia. — IMDb Trivia: bones (2005 TV series)
These set locations show up on other shows from time to time. Royal o jantar, lanchonete is a set and has shown up on other raposa shows a couple of times that I've noticed.