The pearl in the crown of Barcelona's beach clubs, Opium has become as big a landmark as Parc Güell. Dress really fancy and show up before 1:30am to avoid paying the cover charge. Line is always long. Opium brings all the big names in electronic music- Diplo, David Guetta, Avicii. Every American tourist goes there on their first night in the city and unfortunately many times wears khakis. Don't be that guy. #dancing #club