Ex-waitress Mariah Carey — who’s also playing a waitress in her new flick “Wise Girls” — knows horrors can happen behind kitchen doors! That’s why she conducts on-the-spot investigations when she dines out — popping into the kitchen to get chummy with the chef. Mariah told a pal it’s her way of making sure some unfriendly staffer won’t spit in her food or “accidentally” drop her entree on the floor before serving it. (Check, please!)
EX-WAITRESS MARIAH CHECKS OUT THE CHEF
