I could be wrong but if I owned an establishment there is no way I would promote a singles league, just not enough people buying food and drinks. Tough enough by me to find a two person team league. The places by me that have two person leagues, also have 3 person leagues. We are really fortunate that within 35 miles of me, and I live 25 miles out of town, we have two establishments now with 8 tables ea, and leagues at least 3 nights at ea place, if not 4 nights. Also most leagues fill with a waiting list. There also are weekly tournaments, sometimes Friday and Saturday, and occasional singles matchups. Organized pool is expanding in my area, in part do to great league operators and good establishments, and we are not a big metro area.I always hoping for a singles league where you might play one or two matches per night. I suppose it wouldn't even have to be at 1 hall as long as the players agreed on where the match would take place and that it happen by a certain date.
One possibility might be for an informal group of players asking an establishment if they can reserve X amount of tables on a night that the tables aren't normally all in use. You then would be a league operator, ha ha.