I let one go near the end of some sets. Mainly things like DLs and squats when I get to my higher weight(s) (I dunno if it's a GRUNT, but it's some kind of exertion noise, lol). I mainly DB press and less benching, but I still make some noise at the end of those.
Today was shoulder/traps, and I don't think I grunted once... MAYBE on the last set of shrugs to get it up.