Well, the pubs and the sessions I frequent must be a lot more folkie friendly than yours sound, Mark. If I want a drink, I just hook the guitar onto the pub prop, so it won't fall over, and nod to the fella next to me to keep an eye on it. And when it's his turn I'll do the same for him.
Customs - I've said this before, but I've been advised that if you are taking a bouzouki through customs, it's best to describe it as "a kind of guitar". Customs officers aren't allowed to have a sense of humour, and bouzouki sounds too like "bazooka" - it's like joking and saying you've got a bomb in your bag. You'll likely get strip-searched.