They were so boring I would volunteer to do a few shifts at "mothers and babies" and also volunteer for the restroom cleanup crew - now that's the sort of I'm so bored I'm talking about here the "I'd rather be in the company of even more bored crying small children and clean dirty toilets bored!"
Next phase was "just shoot me, shoot me now."
If total mental breakdown occurred I entered into the silly bored phase then a great game to play at big conventions is too roll up tiny pieces of torn paper and see how many you can sit on top of the person's head in front of you before they shake their head. I think my friend and I got to about 5 it also helps if the person has big hair.
Yes, sessions were f***ing boring. Pre-sessions were vacuous, tedious "you're so vain" style meet and greet social torture.