Whiskey River Dance Lessons?

So I've been to Whiskey River in North Houston quite a lot, and I'm always hearing about the free dance classes they offer. My dad wanted to take my mom, so they could learn how to dance for their anniversary (they very beginner and a little dance shy), but I've never actually been to one of their classes and I wanted to know if anyone has gone and could give me a run down of what they do? I tried emailing them, but haven't heard back, and their website is extremely vague about the classes. I'm trying to see if this is something that might suit them and their skill level. I understand it's a free class, so obviously not a one on one, but do they teach a classic two step? Is the bar/dance floor open to regular guest during this time? Anything helps so I can gauge if this is something they'd enjoy.
Thanks!