I define regular as:
1) You go very regularly (a few times a week, at least)
2) You know most if not all of the baristas, often by name (and vice versa!)
3) Most importantly: they know your order
What's sad is that I'm a regular at 2 different coffee shops! It used to be 3, but I stopped going to the third coffee shop. Progress!!
Are you a regular at a coffee shop? Also, what's your regular order?