What's the fascination with this? It seems that most of the "solo dining" inquiries around here look for places where a "good, quick meal at the bar" is available. When I go out to eat, even alone, I like the time to myself, and don't mind asking for a different table when the host leads me to the one by the kitchen door.
I don't drink (in restaurants, anyway - costs too much) so maybe that's the part about the bar that I'm missing, but when I say "one" and the host or hostess asks if I want to sit at the bar, I always decline. What am I missing? When I was a kid, I used to like eating at the lunch counter, but that's about as close as I ever got to enjoying eating at the bar.