I'd be careful. If you're abe to go inside and scope out the joint first, I'd recomend it.
I attended many a teen night at different clubs back in high school, and while there was always a lot of pop music and soda, there was also a lot of suggestive dancing (i.e. grinding). There was always security and checking of the IDs and even "chaperon" type people walking around, but they mostly only stopped the most extreme cases (i.e. "dry humping").
Now, I'm not saying your kids are the type to partake, as there were always also kids who just acted and danced like you'd expect kids to.
I've never been to teen night at the Groove, as I assume I'm too old for that now, but I'm just letting you know from my experiences, as your kids may not always be so forthcoming.
-Kevin