Not at the gym, but I do run just about every day, distances ranging from 4 miles to 14, depending on the day. With that said, I am a.) in training and b.) have built up to this over 3 years of running.
It's not important what other people do. It's important what works for you.
"She is clothed with strength and dignity; she can laugh at the days to come" - Proverbs 31:25