Now, as for doing stuff alone in public, I can very much enjoy it & don't feel a stigma. I like to go to concerts alone, for example. Some of the most fun shows I've been to were ones I went alone to. I rarely end up spending the whole time alone anyway, as being alone makes you very approachable & I always end up talking to someone. Since I'm not one to initiate, it actually is a good way to meet strangers I'd otherwise not interact with, but that is not my motive for going alone.