We ended up going to the Mansion - myself and gaijinboy*
It was really nice. £2 to play. 1st prize was £60, 2nd prize a bottle of wine and everyone got a raffle ticket with a prize of a meal for two. The quiz format was pretty good and actually quite easy. Gb and I didn't do especially well just the two of us, but with your average urban team I reckon we'd have won or at least come up the top somewhere.
We also had some food whilst there which was quite good. It was just full enough - comfortably full - but that's probably 'cos it's January, I bet it can get pretty crowded. The quiz master was good and the bar service/table service was excellent. People around us were friendly and chatty.
Sorry - didn't pay attention to beers as I'm not drinking, so couldn't say what they have for proper beer enthusiasts.
It's definitely not as "normal, everyday pub" as the Elm Park and is decorated more like a gastropub (which it is), but was definitely less crowded and competitive than the Prince Regent. They don't sell crisps - only poncey nuts and olives...
Anyway, plenty for people to slag off in the poncey pub stakes but overall it was quite a nice quiz I thought.
*(sorry Ms T and Biddly - after talking to you Ms T gaijinboy was all like "but I was really looking forward to it" so we went anyway)