Pllek is a good place to be when the sun is out. Take a free ferry behind the Central Station and go to this industrial area. You will find a abandonment submarine and old industrial equipment. Pllek is suitable for all ages and has got live music.
This is one of the most romantic restaurants I know. The menu is based on traditional French and Italian cuisine. You can't go wrong in here. The restaurant is around the corner. Don't forget to reserve before you go.