Just in the last decade, the number of motorcyclists going up to and hanging out at Alice's had shrunk down considerably. It seem like the millenials and younger generations are just not as interested in riding motorcycles as much as we were at their age.
Last few times I rode my motorcycle up to Alice's on a weekend, in the middle of the day, there was barely a dozen bikes up there, when back in the mid to late 90's, the parking lot will be full with groups of riders constantly coming in and out of the parking lot. And the CHP regularly circulating through the lot, waiting to pounce on any hooligans that dare to hoon on their bikes.
As for "tribalism" at Alice's, yes, the motorcyclists tended to park as a group amongst each other, based on what they ride, but as soon as they get off their bikes, most circulate all around the lot to admire all the differen types of motorcycles and talk to their owners about their bikes.
The only ones that are "hesitant" in mixing in with the crowd were the Harley riders. Not all, but a lot of them never seem to lose their negative attitudes against motorcycles that are not "Murrican".......