As it stands Real Sports Bar and E11even are closed until further notice.
About 600 workers are walking off the job at Maple Leaf Sports and Entertainment, a move that affects the restaurants, but not the games at the ACC.
The workers are represented by Teamsters Local 847, and are mainly kitchen, housekeeping and serving staff.
They are also responsible for changing over the arena from a basketball court, to a hockey rink.
The union members rejected a deal that was reached after 6 months of negotiation.
The Toronto Raptors game on Friday against the Philadelphia 76ers will not be affected, nor will the Toronto Maple Leafs game on Saturday night.