Just look for 4v4 and 5v5 open games. Or host one yourself. There are usually enough people interested in those to get a game going. Quality can vary as there's often quite a mix of skill levels. Those games are always a scrum of random people forming teams once all the players are ready (usually by captains picking or top v bottom or something to try and balance it out) - if you prefer to play with a set team it's rarer and would involve getting people here on board I guess. It's far easier to just hop on to an open game online though. Most of those games are played on fastest speed settings so it doesn't take 5 hours to complete a game.

So basically just like elementary school, always get picked last for dodgeball.