LIQUID Gold: According to local beer industry sources, the Mets’ and Yanks’ concessionaires purchase half-kegs in bulk for approximately $29 per half-keg, roughly half the cost charged to bars and restaurants. Each half-keg holds 1,984 ounces, or 124 16-ounce servings.

So, if the teams sell 16-ounce servings for about $6.50, which they do, the profit over the initial purchase price of each half-keg begins when the fifth beer is sold and that profit, per half-keg, is nearly $800.

And that’s why, regardless of the escalation of brew-fueled episodes of incivility at ballparks and arenas, those who call for the ban of beer sales are wasting their breath, ink and time.