You can do your strength training at home or in a gym.
Or, well, you can do it on the train. You can do it in the rain! You can do it at the park… you can do it after dark. If no one nearby cares, you can do it on the stairs. If you’re careful about placement, you can do it in the basement! Depending on your mood, you can do it in the nude. If you’re not a stingy tipper, you can do it with a stripper. With a little bit of luck, you can do it while you…
Oops, sorry. We seem to be heading very steadily downhill.