As someone else mentioned: yoga. Yoga classes with other people. These are solo ventures with the option of interacting with the other people there. This has similarities with other kinds of social workout classes but the difference is that can be fairly low effort, sometimes half of a yoga class lets you fall asleep!

Now you have a common interest with people that practice mindfulness, which is also something you need. A lot of the people are fit women, some might find it interesting that you are there at all and wonder if you're going down the mindfulness path.

So you can still fulfill your goal of resigning from the possibility of connection while creating the option of being social.