“until it came time to pay the bill, when an argument erupted.”
Splitting the check never works. There is always someone who runs up the bill. Ask for separate checks. It’s not too hard on the server.
And then they can all not tip the server separately. I'm not kidding, blacks like these heifers are notorious non-tippers. They seem to have the idea that they're too important and entitled to leave tips. Plus they're cheapskates to all hell, but not when it comes to indulging themselves.