I don’t really have a third place, outside of Hubski, work and home. But my work takes me to a lot of places. I guess airports are my third place these days. I do love riding my bike though. Also, going to the pool. That’s a great time. But the bike and the pool are always with others. Not just me. Maybe I need a third place....
Hubski is 100% a "third place" for me. I travel and move around so much that it's become difficult to establish any type of comfortable place away. In North Carolina it was a climbing gym, on my last extended work trip it was a cafe. I haven't been quite able to find anything similar in Germany. Hubski is always here with more or less the same cast of characters. KB's description perfectly describes how I participate in this community: I may not directly interact, but I also feel no need to. Reading about the projects, struggles, and successes of complete strangers is comforting.
To be fair, I think I've misrepresented the concept by wanting to be a hermit: A third place is somewhere you go that isn't work or home, but it's conventionally defined as a neutral social space where you can interact with strangers. If that's biking or the pool, then you've found your third space! If not, maybe it'd be fun to experiment with if you have the spare time :)
An important aspect of "third places" is that they are place where you don't necessarily interact with "strangers" but more that there's a steady set of individuals who, while they might not be friends, are at least people you know and have expectations of. The seminal book Bowling Alone is about the decline and fall of third places in American society and the effect it has had on health, culture and politics.