Upper Canada Mall
17600 Yonge Street, Newmarket, Ontario
100% positive
Directions: there are a couple around the mall, most accessible is beside Baskin Robins and Lush in the food court.
Comments: mall is normally pretty crowded, so you could probably just slip in and out and go unnoticed. There are gendered bathrooms and a family bathroom, where lots of people go when their bathroom is too crowded. Women's is safe, save for a couple odd states and maybe a little kid asking a funny question.