Many years ago, before I started playing mostly Nordic music, I played in bands for English folk and then Scottish ceilidh dance.
As I recall we'd worked out in advance the sets of tunes to be played with popular dances - we had sufficient sets and variations of tunes to make up a sufficient number of sets to ensure we didn't repeat a set during the course of an evening. I recall we had something like 30 sets, and a maximum of around 90-100 tunes to be played during the course of an evening. We could then select a set to play according to the dance being called (or in the case of Scottish ceilidh dance a caller wasn't usually present so the band announced the dances, the dancers usually being required to know the dances).
We worked with callers that would indicate the structure of the tunes to be played for a specific dance, eg 3 tunes of AABB, or 32 bar jigs, in which case the band leader would suggest to the band the set to be played. This selection was always the responsibility of the band leader. Having a knowledge of the figure structure of the dances is useful for the band in helping the selection of the set to be played for the dance - that is, some jigs/reels may not be suitable for some dances.
[Recently I've been enjoying the English music sessions I've been going to, and am starting to think about playing the English repertoire again - I must dig out my old tune books since I can remember only a small number of the tunes I used to play having played mostly Nordic music for the last 25+ years!!]