We joined Elysha and Doug and did the Houston Police Department's Midnight Classic ride. They shut down Memorial Drive between downtown and the Aquairum and Shepherd to create a 5 miles loop. Between 10pm and Midnight you do the loop as many times as you want/can.
It was tons of fun. Next year we'll get there for 9pm, when they do the family ride, and bring the Cassinator. :)