Ditto. I bartended a decade ago and my shifts started at 4:00PM and didn't end until an hour after close at 2:00AM. We were on our fee the entire time, with only smoke breaks where we weren't allowed to sit down.
Man, I have no idea. They also didn't allow us to take a lunch break during what could be an 11 hour shift because, as one of the owners told me, people weren't clocking out during the 15 minutes it took to wolf down a burger and some cheese fries. I reminded them of labor laws and they made an "exception" for me.
This was, is, a very successful burger place in Dallas and I learned a ton fom the experience.