Whether we like it or not, eating out in groups is an often encountered circumstance. It happens when we have reunions, birthday celebrations, or happy hour after work. For many, the experience is rather pleasant. If you know everyone in the group, there is hardly an uncomfortable discussion about how the bill will be handled. In fact, if you’ve known the friends for years, it probably doesn’t much matter because as often as you eat out together, it sort of evens out. But, what about those times when you hardly know anyone? What happens when you ordered only one $6 drink and someone suggests you split the bill evenly, sticking…