I live in Germantown (fairly close to Mt. Airy) and I would definitely not recommend it as far as social activities. Proximity to the park is awesome, I love the neighborhood, but the restaurant/bar scene is very very limited and if I was single and 27 I would probably be bored out of my mind here. You can definitely drive/transit to other, more active places but the walkability of stuff around here is not great, unfortunately.