In the early 70's, cable television made inroads in upstate New York, introducing viewers to New York City's three then-independent stations (WOR, WPIX, & WNEW), and one from Boston, WSBK, which was a boon to sports fans, since now they had additional options for baseball and hockey.
I don't know exactly when WSBK acquired the rights to carry the Boston Bruins' games, but the hook was in their intermission programming. Instead of just recapping what had just happened in each period, the station aired Mini One on One, a seasonal tournament involving youth hockey teams from throughout New England.
There would be, as memory serves, two matches per Bruins broadcast. Since the games are now cable exclusive, airing on the New England Sports Network (NESN), I'm not sure if they're continuing with Mini One on One.
Let's take a look at a match from 1981 between Milton, Massachusetts and Berlin, New Hampshire:
There were, I think two, maybe three divisions in the tournament. It has been so long, I don't remember.