Loud is the app for clubbing and going out.
When you arrive at the club check in and you will be able to interact with people that are there.
It is a sort of spontaneous social network based on that exact moment when you are there. You will see what others are doing, meet new people and talk to them.
Loud is meant to make those social events a lot more social by providing a dedicated news feed for each location. Use it to share content with the people in the club.