You can also see that Gallery Place Chinatown, Dupont Circle, U Street, and Clarendon are the central night life locations.
It is also interesting to see the drop off in metro traffic on Sundays compared to Saturdays.

My class report can be found at: https://wiki.cs.umd.edu/cmsc734_f12/index.php?title=Fong%2C_Allan_-_Metro_Ridership