I'm off to Ibiza for a friend's 40th in September & am vvvvv excited. However wardrobe choices are causing me a headache. We're there for 2 nights, out for dinner & drinks one night & then taking on one of the big clubs the other night. I'd really like something nice & dressy to wear out on the club night as I don't get to dress up much when going out these days. I was thinking some kind of dress/ playsuit type affair but can't seem to find anything that isn't either super casual or makes you look like a hooker... 
Has anyone got any suggestions for where I should try looking - happy to pay a reasonable amount for it but don't want to go silly as probably won't wear it much back home. Have tried all the usual suspects - Whistles, Next, Topshop, Zara
Help!