Problem isn't new, I've heard the same lament from new hires (fresh from college). Unless they came with a significant other the question always was, besides going to a bar, what's a single person to do?
One thing to check would be your church, they may have a group for young adults, while it will be a "small group" or Bible study, they often do other activities as a group.
Rescue Squad / Fire Dept was a good idea someone mentioned. Not only does it give back to the community, but she will meet people (other volunteers).
There use to be a couple of "coffee houses" that had gatherings. The only one that I can remember is, "My Brothers Place" but that was in Waldorf.
There was one that met in a catholic school up near country lakes development (yes, I'm bad with locations on that).
Coffee Quarter at one time had people perform on Friday or Saturdays - typically drew a young, but small crowd.
Good question, it's something that does affect retention of new hires (from out of the area).
Oh, does she like theater? Newtowne Players, Port Tobacco Players, not sure if there are others. She could get involved with one of those.
