To futher hijack this thread, the charilift is an interesting social dynamic. If you are skiing single, you might get on a lift with three people skiing together with an established history and agenda, Your mission it to either join that group for the next several minutes, or mind your own business. Most of the time, a conversation starter like "great day" or "I hope the sun comes out this afternoon" gets you in. But rarely a group is clearly discussing meeting up somewhere or other plans, and you can just tell its probably time to just enjoy the scenery.
So far, I have never been on a chairlift with someone who thought the social norm was the same as an office elevator. Far be it from me to chat up someone who is clearly into a quiet ride, and those happen from time to time.
Anyway, its interesting how inside of a minute or two you will establish a bond with a complete stranger and either have a conversation, and perhaps ski with them a while, or form that invisible wall. I often wonder about those of you who choose instesd to scold the person for lowering the safety bar. That has to be a fun ride.