I grew up where the Yankee & Red Sox fans meet. It was definitely the line, for one town to the east the vibe was all Red Sox & one town to the west, it was all Yankees. It's sort of like growing up on Capitol Hill, only we were fighting over baseball instead of politics.
This was the 1960's & 70's. I've lost more bets than you can possibly imagine. So I'm rooting for the Yankees vs Astros, so I can win some of those bets back.