In itself, meaningless, as has been said. Joining a society might give you access to conferences, meetings and educational opportunities that you would not otherwise have had, with the result that you could meet people, make connections and network in a way which might help you. So if you are naturally inclined to smooze, and the society you join will give you appropriate opportunities to smooze that you will be able usefully to take up without detriment to everything else you need to concentrate on right now, it might, just possibly, be worth it. For most people it would be a pretty long shot.