Uh, well, this is probably a sign of my questionable personal taste but we walked down to Radiohead's "True Love Waits" and "Karmapolice" (long walk, a few people! It was TLW by the time it was my turn), put to piano by Chris O'Riley.
We walked "back" to the tune of the Hitchhiker's Guide to the Galaxy theme tune. Laughter ensued.
I wanted to walk down to Eel's "Goddamn Right it's a Beautiful Day", but my grandmother would probably have fainted. As it was, the "adults" were wondering why all of the "kids" were humming along with what they thought was random piano music. Our UK friends LOVED the Hitchhiker's theme though, so much giggling and a bit of applause.