Also is taking the MARC train from Hanover or Laurel an option for commuting to DC? Or if you're patient there are commuter buses from Columbia to various places downtown DC.

Depends on your definition of Scenic. Is driving around visiting Covered Bridges sound good? A number here in Maryland and Southern Pennsylvania. Or talking of Pennsylvania, have you visited Gettysburg? It has a great visitor center and a noted driving tour.

Columbia Barbershop. $12 and 12 minutes. Good for basic cuts.