The 14th & U blog has a GREAT list of local retailers where you can pick up holiday gifts. You can also find a long list of local retailers in the Logan Circle area (including 14th, 9th, U, P, Church and Q Streets) throught the MidCity Business Association.
Whenever possible, support local shops in our neighborhood. Our small businesses are one of the reasons we live in an urban neighborhood and they combine convenience and service. Support them if you possibly can!