*This café offers gluten-free options, but is not entirely gluten-free. “No added sugar, but we are sweet!” Zero Cafe is about a 10-minute walk from Hongdae Station, located at the end of a side street off the bustling main shopping street. It is a bit far away from the fashion stores in the same street, but once you approach, you won’t be able to miss it thanks to its eye-catching orange exterior. It’s also in proximity to Honik University. What’s unique about Zero Cafe, as the name suggests, is that it’s not only gluten-free but also entirely sugar-free. Another great thing is their many cream and soda drinks. You can…