Houston (all of Texas for that matter) isn't a pedestrian friendly environment. The closest thing with in walking distance of the hotels is a little strip mall with a pizza place and Hoots saloon. There is a Gas station, Jack n the box, and Taco bell too but its not the best fast food. Most of the good stuff is northeast of the airport by over by the mall. If you can bring a car, bring it, there is a bunch of downtime in the training schedule.