Nothing wrong with one dance/one tune. Perfectly good policy that has stood the test of time.

Hear hear; although I like a good medley, both to play and to dance to, and would also argue that a change of tune (especially if co-ordinated with the first couple arriving back at the head of the set and everyone getting a 2nd tuen through the dance) can make for a change in the feel or subtle emphases of the dance the second time around.

John Kirkpatrick, however, takes a much more hard-line approach on the subject ...