We watch time because we're usually on a schedule where other people are playing too. And because we don't usually have a fixed set list, where we know how long it's going to take to play X number of songs.

Mister has a pocketwatch. Sometimes he wears it and just takes it out as necessary, other times it may get put on a nearby table or chair. If we were to put something on the floor, it would have to be BIG enough to actually see it! :-)

I don't have a problem seeing other people watch the time. If they're having a good time on stage, they're probably sorry (and surprised!) to see the time go so quickly! I know I usually am.