i live in the southern USA,
where calling people hun/dear/sweetheart/honey is fairly commonplace. not so much in my particular workplace, since we have less of the typical southern-accented crowd. but I've gotten so used to it that i hardly bat an eye anymore. i don't like to use them myself, though. i basically never use any sort of honorific, and thankfully that's never gotten me in trouble before. 'guys' seems to work just fine.
it's the sirs/ma'ams that bother me, although perhaps that's more because of my gender identity. i don't particularly like either of them — it feels far too for formal. then again, it is a more expensive store. we tend to get a bit more of the fancier crowd.