Specifically in Houston, TX. Is there some kind of club or organization where insomniacs get together and share stories and treatment options? It just seems like it would be a good idea, considering how boring it can be to be the only person you know awake at 5 in the morning everyday.

don’t think so
probably there is a support group for everything now a days try searching yellowbook.com for a support group and see what it gives you or speak to a dr if its something you are serious about
[...] Is there any such thing as an insomnia support group or community? [...]