This guide will tell you how to add friends in Highrise. You just have to follow the simple steps below to add someone to Highrise.
The first thing you will need to do is open the game, and click on the Rooms button on the left side. There. you will find some active rooms. You have to ask your friend to join any of these active rooms and then join that active room too. After that, you will be able to play with your friend.