My friend and I were at a Nets game the other night, being ushered between exclusive locations by our personal concierge, when suddenly we strayed into an area full of normal fans waiting in line to buy their own food.

It was weird, the way it would be weird if you were flying first class and for some inexplicable reason found yourself in coach. You would not be proud of your ungracious attitude toward the passengers crammed into standard-issue seats in an un-luxurious cabin with no free Champagne, but neither would you want to change seats with anyone.

Nothing at Barclays Center shouts “us” and “them” as emphatically as the Brooklyn Sports & Entertainment Experience, the super-deluxe fan package my friend and I were experiencing that conjures a parallel universe of individually tailored privilege.

Few people experience the Experience. For one thing, it is so intricate — requiring so much planning, such precise choreography, so many people to attend to your every need — that the arena can’t reasonably be expected to pull together more than a couple of Experiences at a time.