When I recently visited Toronto, I came to Fifth twice. Once for my cousin's best friend's birthday and second for New Year's Eve. Before you judge me for going to a club for NYE, no we didn't drop $$$ to get in and yes, I followed along on my cousin's plans. Both times I went to Fifth I had a BLAST. And I don't say that very often about clubs.
Fifth is deceivingly big. From the outside it looks rather small, but when you step in you quickly realize how big it is. It's got a large open concept layout, big dance floor, large VIP seating areas, and I think 4 or 5 different bars throughout the space. There's even a little hidden oasis behind the bathrooms that has some pool tables, another seating area + bar, and a hanging swing.
The service both times I visited were awesome and no matter how busy they got, all the staff kept their cool and were really kind and fun.
I'll definitely have to pay them another visit next time I'm in town.