Metrorail Hours of Operation
On Saturday and Sunday mornings, Metrorail trains will depart from the end of each rail line starting at 7 a.m. Customers waiting for trains in the downtown area will see the first train service about 20 minutes later, and all Metrorail stations will open approximately 10 minutes before a scheduled train's first arrival.

Note: Earlier opening times and later closing times go into effect at times of special events. When traveling late at night, be sure to check the scheduled departure time for the last train. At many stations, the last train departs before system closing time so it is important that you allow enough time to enter the system and board the train. Last train departure times are posted at each station kiosk.
You can Get to Entre Nous @ The Red Lounge via the Metro!

Take the Green Line to the U Street/Cardoza Stop, and exit on the 13th Street side of the metro.  Take a left at the exit, and walk one block toward 14th on U Street. Take a right on 14th, and The Red Lounge is located between U and V Streets on the right side - between Marvin and Busboys & Poets.

Because the metro is open until 3am (last train leaves at 2:30 from U Street) you can easily metro to Entre Nous and back again.