I feel ya...well mine isn't so much due to laziness. I got out of shape because a change of my social circle, my new friends are lazy as hell!
So that cuts out my soccer, volleyball, rollarblading, etc. since I considered exercise as a social activity.
I came to the conclusion that that isn't an excuse. So I'm going to work out regardless if I have a buddy to do it with or not.
Oh yeah, about the exercising in front of other people...yesterday was the first time I lifted weights in about a year....I could barely lift a feather
but then I thought screw it....you gotta start somewhere and the other people working out are too busy about getting in shape themselves.