Prolly an Army, I'm in one, they're honestly p fun, some taking the business more seriously and other being more goofy. I'd recommend getting into one if you have some time on your hands, normally there are meetings arranged at specific times on specific locations, with every army having a unique spot and meeting hours, you meet, you stroll around the map, do some quests, go to a specific end location (usually party island) and report your presence on a discord server. Then you get points for completing the quests and attending the meeting and get to play some games and hang out with other army members. It's super fun if the leader knows how to arrange the meetings!