Never heard it, and it’d take me aback. I’d probably stop, stare quizzically at the greeter, then figure it’s not worth asking about and continue “in”.
I’d be so tempted to reply “Welcome IN? That sounds weird; I don’t think I’ll be ‘in’ at all…” as I back out through the doorway.
Here’s a thread I started on the subject back in 2020:
Needless to say, I started noticing that phrase at retail establishments a few years ago. And like I said in the other thread, it sounds very much like a “corporate speak” greeting to my ears, and I assume it’s something their management is making them say.
I work for one of the big home improvement stores and thay are pushing the welcome greeting as well, but they don’t require any specific wording.
We had “greeters” too, but at least here in Philly its as much to keep shoplifters from going out the in door as it is a welcome
In the southern US (Georgia or Florida IIRC) we stopped at a restaurant for breakfast. When we walked in every employee there said/shouted, “Good Morning”. We were seated and for the entire time we were there, they did the same spiel each time anyone walked in.
It sucked. I ate hurriedly and we got the hell outa the place.
I’m hearing “welcome in” a LOT lately here in SW Washington, and I’m not sure I’ve ever heard it before moving here in June (from Oregon). It’s still sounding strange to me.