They are at the Poop Deck Bar.
Barmaid says they will stay until the sheriffs office shuts them down.
They are really slamming the booze down.
The Poop Deck is a biker bar. Not hells angels biker, but a place where the bikers gather. I point this out because if you think driving a car out of high water is hard, try it on a bike!
I think some people think they can goof off till dark, then go to some friend's house in north Houston to ride it out.