Believe me, I know that people WATCH the rotation and they KNOW exactly when they're supposed to sing. It's amazing! I'm just saying that on occasion, the KJ MUST control the show, not the other way around, that's why you're being paid.
Sometimes you just gotta give em some tough love and let them know that you enjoy them being there but they don't have to be there for the show to go on. February will be 4 years I've been hosting shows and it's been a helluva learning experience. Karaoke is 50% singing, 40% people skills and 10% money.
At least for me...but I still love it and it's easier than working for someone else.
Cid_cat