Hello!
I have some questions working as a hall staff at a diner in Japan.

In Japan, when customers wanna order food, they don’t have to wait for a staff to notice.
They can just raise the hand and say “Excuse me!” to ask a staff to come over. (the staff doesn’t have to be the same person)
I don’t think many customers from other countries know about this and I think they tend to keep waiting until I notice.
So,
Is it weird if I say “Call us when you’re ready.”
when I finished explaining our menu?
Is there any better way to say that?

I just want them to know that they can ask ANY of us to come over by just saying excuse me.

Also, is it rude if I use “let me“ to customers?