gliders can have a natural smell you won't like. If the scent of pee and cigs is that bad for ya, the natural scent of a glider (I feel ours is quite small smell, but my nose is weak.) may be to much for you.
I would think the smell of cig would go away. the pee smell might be them and not the cat. Our friendliest glider sophie seems to want to always mark us with a little pee every night I let her jump on my shoulder.