Well, that's Mayberry talk.
Up here? In my neck of the woods???
They'd say: "Take a seat, please."
In Manhattan: "I'll be happy to seat you. How many are in your party? It will be just a moment."
In a local diner? "Grab your favorite stool, Ruthy, if you can shake old Bill off of it." Bill is a fictional cat made up for that example.
In a Greek restaurant? Often you see an older woman or man, sometimes both, sitting near the entrance with a view of the kitchen. Watching. That would be Mama and/or Papa, keeping a watchful eye out to make sure the waitresses don't pocket the coffee money for tips, keep the customers waiting, assessing if the kitchen neeeds help, wondering if their granddaughter is truly a princes...
I worked in a Greek restaurant for eleven years. Loved it, but when I saw My Big, Fat Greek Wedding???
Hey, that cute Southern Belle waitress is a little slow, isn't she? But she's so stinkin' NICE that I cannot fire her.
Obviously I'm not Greek, LOL!