I concur regarding the gym, never thought it would be my scene.
I used to work at the old techy college, in office right next door to the gym. Never used it once in 6 years.
But, decided to start going to a gym when we got married, 18 years ago. Amazed myself at how addictive it became. Went for about a year then got fed up.
But, decided to start going again a few weeks back, mainly on the bike, cross trainer and treadmill. Will start on the weights when I get a bit fitter. Also just finished a 5 week Golf fit course, which concentrated on yoga style stretching.
Walk about 3 miles to and from work, after the fascist work regime stopped our on site car parking. Feel better for it, however.
I think owning a dog would be a great excuse for me to get my ass out the door of a morning, and of an evening. Win win