Ten is an interesting place. A bit of a cougar hang out but it's pretty fun for a small group outing. I've found the food there to be consistently decent the few times I've eaten there. Sweet potato fries is always the right answer.
The clubbing scene is alright for Mississauga. They have a small dance floor. Music is generally top 40 but every now and then the DJ will spin random Spanish/Cuban flavoured music, but not the good kind... He also has a tough time with certain song transitions...
All in all, a last minute, let's get dressed up to go out, Ten is a fun place to check out. They do charge cover after 10 except Fridays, ladies are free :)
And don't be shy if you come to Ten to dance. Lots of people will be checking you out. Fact of life.