Looking for a highly populated discord, teamspeak, curse group, or something for pick up groups

Does anybody know of some highly populated server for any major social voice program where you can pick up groups of random at any time of the day? I don't want to risk demotion in ranked at this point in the season so I want to play normals. But normals just aren't fun on my own. I want some kind of group that's big enough to where you can find other random people that want to group up at any given time to play normals. Would also be helpful in getting hextech chests as it increases your odds of giving one by 400%.