If you're looking for a true beach party in the Ibiza sense, head for the island of Pag. Just outside the town of Novalja is a beach called Zrće, a haven of white pebbles and crystal sea. Aquarius, probably the best club in Zagreb, has a superb space here, with places to eat and drink, home-made ice cream, an aerobics club (daytime), and dancing by night. The club is superbly equipped – cool off in the bar area in a paddling pool. Quality.