Regulars

Four reasons that 'The Regulars' in a pub are called 'Regulars'

1. They are in the pub regularly
2. They are regular (as in, normal) - the usual regular is your run of the mill old bloke. Normal 'Regular' hobbies include: football, fishing, beer, cars, violence towards both men and women
3. They are regular (in toilet terms) - don't ask me how I know this.
4. I regularly have this exact conversation with any one of them:

Regular: Sophie! How are you?
Me: Hello! I'm good thanks, how are you?
Regular: Oh, I'm much better for seeing you, darlin'
Me: (Feigning surprise and enthusiasm) Thanks!