Somebody just posted a link to a TEDx talk by a bike guy in the Dallas suburb of Oak Cliff (technically part of Dallas, per Wikipedia).
http://www.archdaily.com/218310/tedx-how-to-build-a-better-block-jason-roberts/
A page on "Bike Friendly Oak Cliff" with local rides and stuff (though the formatting is messed up right now):
http://bikefriendlyoc.org/bfoc-resource-guide/
It links to this bike shop:
Maybe they rent, or can refer you? Lots of other links on that page too.