Regarding the Australian Model . . .
I occasion a southern bbq restaurant with several locations. It uses this model, except they will come by to ask how you are enjoying the food, ask if you need anything else, will bus the table, and after you leave will finish cleaning the table, wiping it spotlessly clean. The manager also walks around (is engaged / present) and may welcome you on the way in or thank you on the way out. Never engaged an employee with a bad attitude - all very positive. But they are not in your face / making a pest of themselves. Food is above average. And they also have a drive through in case you cannot come on in to sit down.
Sounds like breakfast time at Dan’s Hamburgers (Austin) - some good eatin’