I've been to Studio Lounge Karaoke many times and enjoyed my stay every time. Beside Sushi Moto and Smokey Joes around Sheppard Ave and Yonge St.
They offer a wide variety of drinks and food and the rooms are all decorated with a modern flare.
It's good for groups and even has a bar/lounge area! When I go, I usually go with friends. The service is good with friendly staff :)
They have a wide selection of songs projected on flat screen TV's.
Promotions I'm aware of are 6PM-9PM is Happy Hour and Thursday is Girl's Night Out and Soju Sundays. They also do bottle service with various promotions. I don't know if these will change but as of this moment. When you call in to book a event, just ask!
Really recommended.