Men dressed in traditional rifleman uniforms drink together at the Oktoberfest 2013 festival in Munich, Germany, on Sunday, September 22. Oktoberfest is the world's largest beer festival and runs September 21 through October 6. Lennart Preiss/Getty Images
Beer drinkers laugh together in the Hacker-Pschorr tent at the festival on September 22. Johannes Simon/Getty Images
Visitors wearing traditional Bavarian clothes sit outside the Hacker-Pschorr tent. Johannes Simon/Getty Images
A woman takes a drink in the Hacker-Pschorr tent. Johannes Simon/Getty Images
Revelers reach for the first beer mug at the Hofbraeuhaus beer tent during the first day of Oktoberfest, Saturday, September 21. Johannes Simon/Getty Images
People celebrate the opening ceremony of Oktoberfest. Matthias Schrader/AP
A man leans against a woman on Day One of Oktoberfest. Alexander Hassenstein/Getty Images
A large crowd gathers to drink on September 21. CHRISTOF STACHE/AFP/Getty Images
A waitress delivers mugs of beer after tapping the first barrel. Johannes Simon/Getty Images
A couple walk around the festival in Munich on September 21. Alexander Hassenstein/Getty Images
People raise their glasses after getting their first beer of Oktoberfest. Joerg Koch/Getty Images
Revelers wait for the first beer barrel to be tapped. Johannes Simon/Getty Images