I've stayed in a bunch of B&B's over the years where we were the only guests. Do an off-season roadtrip through Scotland: you'll find 'em.

Totally normal and expected at times...always fun to talk to the owners. When you're the only couple there, they might even share a little whisky with you. @:-) Or take you on a walk through their village to tour the local pubs...

I'm sure many inns simply close for the off-season, but the ones that remain open seem perfectly happy to receive one couple in an evening.