I had a bizarre experience over the weekend: a session inside a 2.5 km canal tunnel involving 20 morris men split between two narrowboats. It was about 50:50 songs and tunes, and the sound was phenomenal. Tunes included Le Canal En Octobre (naturally), Out on the Ocean, Over the Waterfall, Salmon Tails Up The River, Messing About on the River, and many more nautically themed ones (and plenty that weren’t thus themed). Most of the songs were shanties.
Any other strange locations for sessions that worked brilliantly?