Try the Taybank Music Bar in Dunkeld, Scotland. It's a small pub, but there's a piano in one corner with house instruments (fiddle, guitar, etc) on the wall above (see a picture of the bar). Dougie MacLean set this up with the idea the idea that visiting musicians could stop by and play at any time. I spent a very pleasant evening playing fiddle there a few years ago. Very civilized.

Cheers, S. in Seattle