I have to echo what saef said (and of course, what rexsox33 said, too).
Honestly, nobody cares what you are doing and although I see that some people look at me - just like I look at THEM when they are in my field of vision or I see them doing something interesting - but it has never bothered me.
I did have to "pep-talk" myself to go to the gym the first few visits (maybe 5) and then my little insecurity went away and I simply started having fun.
I only wish I had started with the gym 20 years earlier!!!!

