mysteries of time and social dynamics - "run it back"

so unfortunately, i don't play much pick up basketball anymore, but one of the great mysteries of pickup games was how long it takes to transition from one game to the next and how the new one starts
so you have a full team ready who has 'next' (or 'down' or whatever)
so the previous games ends, losers go and sit or take off, new team comes on the court and then...
some people kinda shoot
some people shoot the ****
some people check phones, drink water....
when does the next game start?? who knows?
who decides when the next game starts?? who knows?

maybe about 10 minutes later, the game starts?!!?!?!
a mystery i tell ya