[Claire]

Roughly speaking, in England anyway it's interpretted as the scottish version of a barn dance / country dance, usually with a "ploughman's supper" thrown in.
If you don't know what country dancing is, the best description I can give is that it's dancing with a partner usually in groups of six to eight people, often to music from a smallish live band, with the moves usually being called, and it's rather energetic.... but maybe someone can give a better description if you still don't get the drift! Think line dancing with a partner in a small group rather than a line, and possibly slightly less uncool...