I am at barber. Is it correct?

Hi,

A: Where are you?
B: I am at barber. Is it correct?

A: Where are you?
B: I am at the barber/ the barber’s.

Hi,

If I choose the second option. Would it be;

[color=red]The barber’s ‘without I am at’?

No, that is not what the slash mark was intended to mean. Do you see that the 2nd ‘the’ is not capitalized?

Mmmmm. Then ‘s’ what for??

What I know that ‘s’ stand for the owner. Like when I say; "I’m going to Maggie’s’’.