No car? You're not going to Space Center Houston. It's an hour drive from the airport with no traffic. I live near it, so I won't be very helpful for restaurants near the airport. I recommend Pappasito's (Tex-Mex). Locations. I think the Humble location is closest to the airport, but I don't know what the cab ride will cost (I ignore the one in the airport because I don't think it's a full Pappasito's - someone correct me if I'm wrong). Maybe you can luck out with a hotel with complimentary shuttle service.