my first build was a clubhouse in the secret plane inside the bed in the bedroom and the small space inside of the wall leading to some spacious concrete room under the bedroom, it had a security system that only let certain people inside, some guard TANK zombies that if you went thru the invisible brick and were unauthorized it would change your playertype into a survivor, shoot the zombies using projectile events and then close you in the arena. also it confiscated your weapons when your playertype changed.it had all basic clubhouse stuff.My first FIRST build was a box you had to crawl into that was filled with weapons.and a light that you could turn on by touching it :/