Great if you like hoards of drunken Brits marauding around the streets looking for members of the opposite sex in a drunk enough state not to reject them, puddles of vomit and urine (I'm not exaggerating!) karaoke bars and Irish theme pubs. The morning light brings a place for these people to return for their full English Breakfast at Koppas Cafe to the tune of Copa Cabana. This is the highly publicised part of San Antonio, but it's not the whole island experience.
Unique Suggestions: It does sell cheap drinks though, hence the high number of drunk people!
Fun Alternatives: Explore Ibiza Town, go to sunset strip, KM5, Coastline Cafe, Kanya bar, The Funky Lounge, all of which won't charge you to get in.