Assuming you are male.....
From their site....
Single men are welcome at some events on Sunday evenings, check the event calendar for details. Single men are always welcome on Student Mondays if they are 35 or under and all ages every Tuesday and Hot Springs Wednesday. Toronto has many great options for single men on other nights, but Oasis Aqualounge on Thursday, Friday, Saturday and daytime Sundays is designed for women and their partners only. Some events have a dress code, such as Genesis (a private Fetish event the third Sunday evening of every month). Visit the event listing for the day you want to visit for entry policies. You must always be 19+ to visit.
Edit..I think single males can attend during the day, but if it is a couples / females evening you will have to leave by 7 I believe.
During times single males are permitted, they cannot travel to the third floor unless accompanied by a female or couple.....