The only club from Kingston that I can recall is Shakers - just north of Princess Street...I think it was on Montreal Street if memory serves...
I cannot imagine someone leaving the Strip for Shakers though - if that is greener pastures it would say more about the Strip than Shakers...unless major improvements have been made in the last couple of years...
The Strip is still capable of providing good times - Halo, Bianca, etc. are gorgeous and when I was in a couple of weeks ago it was full of patrons (although it was a Friday night). The mileage is significantly less than the Falls, but still enjoyable.