Scandinavian SCM day

How can you justify "being away from work for 8 hours":

In a work context it is not unusual to have to consider the Return-on-Investment of proposed activities. What is the short- or long-term value that a certain thing will bring to the person, the project or the company? Leaving your company for one day to enjoy yourself at the Scandinavian SCM day for many participants need more reasoning than "I like to hang out with a group of cool people".

So, what could you get out of participating in the Scandinavian SCM day?