It’s a quiet morning in Istanbul’s Cihangir neighborhood, and Serkan Ipekli is tired. The 2013 Turkish Barista Champion is fighting an ear infection, but he’s also experiencing the grueling pace of running what amounts to be a 24/7 business: Geyik Coffee Roastery & Cocktail Bar. Geyik, which means “deer” in Turkish, only opened five months ago, but it’s already been a wild ride….