Reading Elizabeth's comment in another thread, I thought I would post the link to next years Southplains Leatherfest that occurs at the end of February every year in Dallas.
The classes are split into two "tracks" - one for people who are into the lifestyle, and another for those that are into a more serious master/slave relationship - or like to incorporate aspects into their lifestyle.
It originally started off as a purely gay workshop, but over the years its become quite hetero-friendly. But if you have qualms about being around gay, lesbian, or transgendered folks, you may not want to attend. I'm not bashing anyone, just pointing out the obvious that you'll find if you go to their website.
You can get a complete list of the class schedules and event location by going here: http://southplainsleatherfest.com/index.php