Tonight I went to a proper Scottish ceilidh (pronounced "kay-lee", like the Firefly character) with two friends. It was possibly one of the most fun things I've ever done in my life. There was a band playing music--I think there was a guitarist, a fiddler, and an accordion. It was a little bit like square-dancing--a lot of people grouping up into couples and spinning. There were quite a few men in kilts, with sporrans. I think I even saw one man with a sgian dubh, which is a type of ceremonial knife that men stick in their stockings so that only the hilt shows.
I'd write in significantly more detail but at the moment I'm exhausted.