If you're planning to bike north (maybe to Qualia Coffee or Domku) there are some new Capital Bikeshare options for you: the service has added stations at 14th & Upshur, 14th & Colorado, 5th & Kennedy and Georgia & Emerson. They also added one at 18th & Wyoming in Adams Morgan and others around the city. There's more info here (you have to hit "next page" to see the Petworth ones) which also includes the full list of 18 new stations around the city.
I use CaBi multiple times a week, and it's fantastic. I encourage you to check it out if you don't use it already, it's great for short hops or runs down the hill towards U Street. The phone app that tells you which stations have bikes or open docks is really useful too.