Makarska is one the best party towns in Croatia. It lays at the Adria coast and is known for its good wheather, for the most beautiful girls in Croatia, its night-life, clean water and beaches (outside Makarska city), good food and cold beer.
If you want to stand some longer time I prefer a apartment to you. There are a lot free rooms but you will have to search a while. Prices: 7 to 15 € (15-30DM) per person.

Here some impressions from Makarska...

links: dalmatinka.de