There's not a great deal to do in Trogir at night in the way of clubbing, but everyone heads down to the Riva (the waterfront) to hang out at the bars there, such as the popular Big Daddy bar.
Dress Code: I wouldn't bother changing from your flip flops for anything in Croatia.
This is the tradition; when you come to Trogir in the evening, the first thing to be done is to take a walk around city. It starts with Riva, where you can see all kinds of new and big yachts (and people on them having dinner), street shops wits souvenirs,jewlery and food, street artists...
Dress Code: Everything goes