I'm not on the market... but if I was... the gym is great picking grounds for a mate.
most people in society DONT take care of themselves. If someone trains consistently, then they're already in the 5% of the country that eats, trains, feels and lives better.
And many people go BACK to the gym after suddenly becoming single... they're already married, they just haven't found the new mate yet.
I go to the gym during the day sometimes... there are young moms, 8 months out of a divorce, and they are just scanning the place 24/7 for their next hubby.