When I was younger I used to absolutely avoid it, I could just about put up with a fast food place by myself, although I would prefer a drive through where I could sit in my car. Anywhere you needed to be seated and ask for a table for 1 was pretty much out.<p>I definitely felt a stigma from eating alone, it doesn't matter how small that stigma was, or even if it was just in my head. My insecurities were amplified by social anxiety. I was single, not by choice, through lack of success mostly due to anxiety / insecurity. I felt like everyone seeing me as a young man eating alone would notice me and instantly leap to the correct conclusion I was unhappily single (and the incorrect conclusion I had no friends) and judge me as a failure.<p>I am now older, married with a young child, a chance to eat alone at a restaurant would be a rare welcome opportunity, but asking for a table for 1 is still a little uncomfortable for me.
I know most people won't notice me, or care in the least bit why I am there. The server will have probably severed 100 lone diners that week with various reasons for being alone and I will not stand out from them in any way.
The logic of that is mostly irrelevant and has limited impact on how it makes me feel.