By Lindsay Rogers LaGuardia Airport: the third busiest airport in the New York metropolitan area, and the only place you can experience 25-foot-tall indoor fountains/New York-themed light shows alongside a $27 Sam Adams Summer Ale. Or at least you could until recently. Last summer, a tweet regarding the egregious food and alcohol prices in airports went viral, prompting an investigation by the Port Authority of New York and New Jersey, according to Travel + Leisure. The tweet was posted by a traveler passing through Terminal C a LaGuardia, and it showed a picture of the drink menu at Biergarte…