To avoid letting down your friends, you are obligated to play when you don't want to.
"I believe societies are only in the foreign servers, but still worth mentioning"
""Guilds" are a recent addition and they have member list sorted by scores aka how much you have contributed. Scoring too low will run the risk of getting you kicked out since there is not even a chat feature to explain absences, so you need to work hard to remain important."
"Weekly alliance treasure hunts require everyone to play in order to get the best results. However, it is viable to play in an one-person alliance at your own pace (and I recommend it)"
"There seems to be a lot of angst among players to visit their 256 friends each and every day (and send them as many "gifts" as you can). It used to be 100, which I found impossible to keep up with, and now at least a few players are asking for even more."
"Has teams you can join and rewards based on your team's performance. Also has a chat option with your team"
"there is a chat function for the group you are in and people comment there as goals can only be achieved through collective play"