I've often thought about this subject. I've gone to restaurants on my own-or tried to anyway-as the selection in Crewe town centre is rather slim. (Why can't they have a Cafe Rouge here?! Why?!) My current favourite haunts are Costa Coffee(it's nice and comforting and there's good use of space there), and Subway and McDonald's(old, safe stand-bys). I'd much rather go to a pub and have a proper meal, but, when I tried to once(at our Gaffer's Row/Weatherspoon's), I felt self conscious and out of place for being there.
I've been to Hanley town centre on my own once, but, it was during my early days here in the UK, and wasn't used to everything yet, so, I went home after only 2 hours. :[
I want to go to Manchester or Liverpool on my own in the future; and my cousin's coming in from Chicago to London for a visit, so, I hope to make that a day out as well.