Is there a KJ and is there a local group that sings here regularly? How is the wait time and what days are Karaoke offered? What is the best night to go and sing?

Karaoke every night. If you just choose to sing at the bar get there early because it will fill up and the wait will be very long eventually. They have happy hour all day Sunday and certain hours other days its half price for the private rooms then, you will want to call in advance for a reservation at least a week for a weekend night.

No real KJ from my experience.

The best night IMO is Wednesday. The happy hour room price of $4 per person per hour lasts all night, and there are fewer people using the rooms. That's for private rooms by the way. The bar is free and you can sing more publicly there.