It is safe and convenient. Below is the Metro link which has detailed information about Metro. If you don't like party scenes DC has many other entertaining places that you can visit. Then catch the Washington Wizards at MCI center, the Redskins at FED EX field. When you think of DC, most people think of Republicans dressing in ties and suits, monumental buildings.
Lives are boring.
No, DC is more than that. DCtonians, Virginians, and Marylanians know how to party hard. After sunset, many Virginians and Marylanians drive to DC and the party begins. People sometimes partying upto early hours of dawn. Clubs, bars, restaurants are fulled with beautiful folks.