All shoots are covered in the Rallying Point forum
Go give the RP a once over, or run a search to see how many Houston shoots have gone in the past.
We're working on an Austin Shoot for January 21st, which I'm currently trying to wrangle.
Main lesson learned: you have to present a concrete plan When/Where/Cost really early on, and ask what needs to be changed. If you just ask "who wants a group shoot", the thread will meander for weeks. Write up a full game-plan, and see who salutes. If folks have a better idea, modify the plan and post up the new one.
If you or other folks are feeling ambitious, you can also run the search engine for any past Houston-related topics, and PM Houston folks to let them know about the Houston Shoot thread.
Good luck finding/starting a Houston THR Shoot,
-MV