Most rec leagues around here assign teams, get volunteer coaches, the kids practice once or twice a week with their teams, and then play other rec teams on Saturday.

What's profitable for a club and what's fun for kids are two entirely different setups.

Dude, depends on your city, league, age, gender. Need more specifics.

Saw one that had volunteer coaches playing a few practice games a week on either a half or full field, then a match on Saturday.
Another league was using their own staff to do the coaching, with maybe a few volunteers, everyone at one location.
Matches were played by splitting a 9v9 field into 4 fields with smaller goals, then the teams were made up on the spot.