Where do you live? Some of the dog parks in the area are more reliably busy than others, and some are very busy and social at certain times of day and empty at others. The Shaw dog park on 11th and R is one of the most reliably busy in the city at any time of day. I really enjoy the Heurich dog park in Hyattsville. During the week that one is best between about 6 pm and 8 pm.