Well, on the Disney Magic it's not really a "running track."
On the Carnival Fantasy they had a short circle for running, and it had a rubberized "track." But on the Magic people use deck #4 for walking/running. Once around the deck is a quarter mile. We saw a lot of walkers and joggers, several times, when DH and I were enjoying those wonderful wooden "blue cushioned" loungers on the deck!! Never saw any kids really using it, but don't know why they couldn't.
Actually smoking is allowed everywhere out doors on the ship. We enjoyed seating on deck 4 and never ran into a "smoke" probelm and I hate the smell of smoking. The only problem we ran into, was for the tropical party, a guy was "trying" to smoke a cigar. He couldn't keep it lit. I would have left if it wasn't so entertaining!
I used the track probably three or four days on our last cruise. DH and DS would go up to ESPN and I would walk two miles to just keep things "in check" lovely place to walk and I did not notice any big smoke problem at all.
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