In one of the bands I play in, we have a pretty extensive list of sets. They are grouped by type of dance, and listed numerically and by name of first tune in each set, e.g. all the 1s are Gay Gordons Sets, all the 6s are Eightsome Reels (9 tunes in each set there!)
At the end of the list, is a large group of "one-offs" for specific named dances. However, many of the latter group can be used for other dances, so our computer person has further referenced each and every set as, e.g. 32-bar jig, 32-bar reel, 48-bar jig, etc. Not everyone in the band is actually a dancer, but those of us who are can advise which sets would fit which dances. ( And yes, we have Peter Milne too.)
We do introduce new tunes and sets from time to time, but these will be catalogued into the appropriate group as above.
And we take it in turns to choose sets for practices and gigs, a month each, so it's not always "the lead musician" who makes the choice: so the set list for a gig is pretty well decided in advance, not on the night: (however, sometimes changes may be made on the night, depending on possible requests, competence and age of dancers, etc.)
But going back to Leenia's original post, if people want specific esoterically named tunes added, they should be pointing you to a source, nit leaving you to do all the donkey-work!