Exactly. You can see it all the time at restaurants. Take a group of men and an equal sized group of women.
At the end of the night the women will separate out each drink good item and try to figure out a way for each to pay their own share. This takes a long time and is seldom right.
The guys throw a bunch of money in the center of the table and see if it adds up close to the bill and leaves it. This is faster but sometimes you end up over paying by a lot.