There are swinger clubs everywhere in the US. Just go to:
http://www.swingersboard.com/clubs/
It's a free site and you can check out clubs in your area. I attend frequently, all over the country. And yes, some of the BEST are in Texas. By far, though, the best in the US is Red Rooster in Las Vegas.
The key to voyeurism at swing clubs, if you're a single male, is to develop a true friendship with a swinging M/F couple. Most clubs require a single male to attend the parties with a couple. Once you're there, check it out. It's extremely comfortable. It's like being in a bar without boundaries.
As you browse the listings above, note that "on-premise" means there will be sex, and lots of it. "Off-premise" means heavy flirting, but no action in the club itself. I've never gone to an "off-premise" I liked, cause I'm an exhibitionist and always want to take it farther than the rules allow.
One more thing: Most swinger clubs aren't teeming with 20-somethings. It's a more mature crowd, and I'd say the average couple is 30-45 yrs. old.
Have fun!! It's a wonderful lifestyle for many people.