I'm still trying to figure out what this is. But I'm not getting far. So I'm going to hazard a guess, just to get you to resolve it and show us the inside:
Could this be the museum behind the church with the old pictures or something like that? While I've visited it several years ago I can't remember how it looked.
You're not too far off Armin. However, this building is not behind the church, but opposite Jura Stores... I will post a picture from the inside, just to create some confusion, but won't tell what it is (yet)
The Maggie is one of Ealing studios lesser known comedies. A wily old skipper of a Western Isles 'Puffer' and his motley crew lead all who come into contact with them a fine old time! Many scenes on Islay!