hahah at my first job at bk we used to yell "price check" when there was a hottie out front and all the cook's would come out of the kitchen stare at the hottie and then look up at the menu for a sec look back at the hottie and then go back in the kitchen............. lololol
I worked at a restaurant and whenever hots girl came in the store whoever was at the register would knock on the metal bar that holds the tickets to get whoever was on the line to look up.
But to the OP, I just give them a quick look, as in let them "catch me" looking but not staring. Especially when I'm walking around campus, some people just walk around engaged in themselves but I like to see people walking around, besides hotties there's plenty of people who just do hilarious with/without realizing it.