I have friends who've gamed on beaches and in castles; I've larped in the woods. There used to be a particular student flat in my uni town, a ground floor flat with a leaky cellar that was used by many (though never me, sadly) for horror games, particularly Cthulu.
|The castle with this view, in fact. *rainbow not always included.|
The most unusual place I've roleplayed was on the coach to Warhammer World the day I met Husbit - the way I met Husbit. The journey is a good few hours and none of my friends were coming so I was bored. Behind me, I could hear some of the regulars from the store a town over, who were sharing our coach, playing some corrupt version of D&D. Even if I hadn't been bored, I'd have probably tried to join them. Luckily enough, they let me. And Husbit (who wasn't Husbit at the time, just Al) wasn't playing in the tournament that was the purpose of the trip and popped round to see how I was doing and we had the same phone in the same colour and he was so goddamn cute...
So yeah. The most unusual circumstance was the process of falling in love. Or lust, at least. Either way, worked out well for me ;-)