I always thought the appeal of Ibiza was the eclectic mix of music, and in San An you get buckets loads of that. From the chilled sunset bars, thru' the full on party bars of the West End to the more family orientated in San An Bay. In San An Bay there is Summun, and in the West End is Soul City, they are very R&B, UKG, soul orientated but a lot of bars in San An have a wide music policy like Cheers or Hogans (just ask the DJ for what you want), or specific types from Indie Rock at Ground Zero, to oldies at 60,70,80,90's. Other bars have a different style each night, so look out for the flyers.
Explore and enjoy