We went to Ibiza last year. Unbelievable experience. Can't wait to return. As for Seattle, prepare for a big let down. The clubbing scene here is pathetic even compared to other U.S cities. Coming from London, you are going to be in major withdrawal. There are a couple of places that are okay, I guess, Showbox and Spy. They occasionally pull in big name DJ's. They close early though and not too many people are up for it. There is a rave scene, although I've never been. Try FX if you're interested. I'd say the major thing to do out here is enjoy the outdoors, something you probably never had a chance to do in England. Cheers