Hi, I live on Ibiza. Yes you can ealk but in the heat it0ll take about half and hour or more. there is a ferry from the Hotel Milord straight across the bay or there are TIB buses which run frequently and are cheap. What clubbing? the real clubbers go to Pacha and Space and they are in Playa d'en Bossa and Ibiza port, and very very expensive to get in to. There is Es Paradis and Eden in San An so I suppose that is where you'll be going. In the Bay area are lots of club bars and a good time can be had. Have a good time!