Hmm.. Maybe the Lake Louise one didn't have this option, probably would explain why they had them every other 4 chairs.
I don't see the hype. They are good for when it's blizzarding and everything, but there are a lot of douchebags out there that have zero respect for anything that isn't theirs.
I can just see these things getting gross and disgusting from people spitting chewing tobacco and all that other fun stuff.