A gym in the Netherlands had its first "Naked Sunday" yesterday. On Sundays, gym members can work out in the buff, provided that they put a towel underneath them while on the equipment.
Personally, I wouldn't want to work out naked. I wouldn't want to be naked in public, period!
This picture was found on a nudist-retreat/camp/colony site. I edited it for the any young eyes... but mostly to preserve the fellow's dignity. What little he has left.