Just cause you're a regular doesn't mean that you get a free pass for treating the hard working staff anything less than great. There's just some kind of mentality that seeps into the mind of a regular (sometimes), where they think that they can trouble the waiter/bartender because they've been there so many times, and leave a decent tip. Enough is enough. Sounds like these ladies did not make their return after staging a very unnecessary public freakout.