All of the inns in the five major cities are unique. Aside from those, all the rest are essentially carbon copies of each other.
As to the barmaid, she was one of the first Skyrim screenshots we saw when our frame of reference was still Oblivion or perhaps the Fallouts. In that context, she looked amazing. As to how 'exciting' she is, she's at least as attractive as any other NPC in the game if that's your metric. On the other hand, how 'exciting' can a barmaid be?