Several of us have just got back from the 2008 Advantage Conference, which was held in the pleasant town on the coast of Catalonia. It's about half an hour from Barcelona airport, and it looks like this:
Sitges is a cultured, middle-to-upper market and very gay-friendly resort with some 17 sand beaches. Advantage attendees were impressed, and most people I spoke to pointed out the attraction of twinning it with a few days in Barcelona.
Look out for FC Barcelona players, by the way, some of whom apparently have boltholes in the area.
More Sitges photos in my Travel Weekly photo gallery...