"It's widely know that people have sat down together over a beer to resolve differences and disputes. We're happy to know that beer continues to be a beverage that brings people together for fellowship and our beer Blue Moon may be considered for the occasion," said Julian Green, a spokesman for MillerCoors, which owns Blue Moon.
"Blue Moon is a classic style of beer that is artfully crafted with an inviting twist and would be great for any occasion when people want to connect for a lighthearted moment," Green said.
Blue Moon, however, could be a problematic pick for the Democratic president, because while it is marketed as a small craft beer, it was actually created by Coors and today owned by MillerCoors. The Coors family has been a long-time supporter of the Republican party. Additionally, the AFL-CIO ran a decade-long boycott of the company's beer in the late 1970s and early '80s.
Gates told The Boston Globe over the weekend that he was partial to Red Stripe and Beck's. But both of those are foreign beers. The White House only stocks American beers, under a tradition dating to the Johnson administration.
Budweiser isn't a slam dunk either. Some could argue that the beer is no longer an American beer after being bought out by Belgian-Brazilian beer giant InBev, maker of Hoegaarden, Leffe and Stella Artois.
Devin Dinneen, general manager of Tommy Doyle's Irish Pub in Cambridge's Kendall Square, the bar that Crowley was in Friday when the president called, inviting him to the White House for a beer, offered some perspective.
Dinneen said Sam Adams Summer Ale "is a good seller in the warm weather" but that pub also sells a fair amount of Guinness, being an Irish bar. He also suggested Magners Irish Cider.
"It's a nice summer drink with a bit of ice," Dinneen said.
He was there on Friday when Crowley and some other police officers were eating lunch and Obama called.
"They're regulars at the bar because the [police] station is right around the corner from us in Cambridge," he said.
But Dinneen couldn't say any particular beer that Crowley likes to drink. The New York Post reported that he had a Blue Moon during the call. But Dinneen said the sergeant was drinking "orange juice, I think."
So what beer would the manager of Crowley's bar choose if he got to go to the White House?
"I would have the most expensive beer I could order, I suppose," Dinneen said. Or just "maybe a cold pint of Guinness."
Matt Simpson, who goes by the nickname The Beer Sommelier, provides craft beer consulting for individuals and businesses and writes the "Ask Beer" column for Beer Magazine, said his first choice would probably a Hennepin Farmhouse Saison from the Brewery Ommegang in Cooperstown, N.Y.
"It would probably be the single beer that would go with just about every course served," Simpson said. "So, if I could just choose one, it would be that one because it pairs remarkably well with salads and cheeses but has enough body, heft and flavor to balance out other richer, heavier entrees."
Simpson said Sam Adams -- with its very wide range of beers for all tastes -- or Goose Island would both be great choices.
"There are many great craft beers that are made right here in the United States that have lots of flavor, aroma and complexity that would give them lots to talk about besides race relations," he said.