That shirt must have some magic powers. Do people really want to get away from their wives that bad?
Well, you are kind of on to something there, but not 100%, now all I know is Texas and Southern. So in Texas the big city teams are usually the work of a group of captains in each city that accept the challenge of putting together teams, so they'll have multiple regular, mixed, combo, and tri-level. I know a couple that don't play and still travel for weekends to sectionals etc., I mean they play tennis, but don't play on their teams, at all, just watch rec tennis all weekend and tinker with lineups. It's, interesting, I've even seen full blown yelling arguments about lineups, during sectionals, at the event, if you are intrigued at all by human behavior, it's a very entertaining niche'.
So that's big city, same with southern, although a city like Memphis or Nashville, big ones in southern, are not even as big as some Dallas or Houston suburbs. Like for tennis, Memphis has about 3-4 4.5 teams and Dallas will have 15 with some having 25 players deep. At 4.0 in Dallas or Houston, you could play for years and never meet/see all the 4.0 players.
Anyway, the people from cities in southern also have the super captains, to a much much lesser degree.
Now, the rural southern teams that are quite good and mostly self-rated, I've seen a couple rural teaching pros self-rate, form teams and take the group through the tourneys. I've seen many more 18-24 year old super teams too, I think if you live in a small town area it's pretty fun to go to the big city and play tennis. PLUS, in southern, good luck finding tennis tournaments, the closest UTR are 600-800 miles away in Dallas and USTA tournaments are few and far between. In Texas there are tournaments every weekend almost if you are willing to travel between the cities.
So, a few groups, super captains, normal old guy groups (27-45) playing 18+, and the rural twenties guys.
Now, the married guys in the normal old guy groups, a large number just can't make sectionals because of family stuff, although they would prefer a weekend away from family. But, yes, of course there is a group of married guys that enjoy getting away from their wives, but it's the minority.
Most of the repeat customers at nationals or sectionals are either drug along by super captains or are single and tennis is their social outlet pretty much.