We had brought a Groupon for the Stripper 101 class about a month before our trip. Redemption over the phone was super easy - you just look at their class schedule online and then call to make your reservation. Pick up is at will call in front of the theater and meet up is at the bar.
Our instructor was super cute, very personable, and didn't judge us for being just plain bad! There were some super loud ladies in the group that just kept talking amongst themselves when she was trying to teach and we could all tell she was getting annoyed. But she never gave anyone an attitude, which I gave her serious props for.
The class was a lot of fun - especially the chair-strip dance part. Very informative!
If you can catch a Groupon for this class, I really think it's a great way to spend about an hour while you're in Vegas.