There is actually a Hubpages Sub-reddit, but I don't think it amounted to anything for those who tried sharing on it. It has been resurrected a couple of times, but the risk of being banned for self promotion is not worth any potential views. My case was a fluke.
If you want to try to create that kind of traffic, it would be best to join groups or forums in your niche, and become a respected member, that can occasionally say, "I wrote a Hub about that..." and provide a link. If you come across as self promoting it won't work for you.
I used to share on Stumbleupon and that brought in a few views. Google+ is useful as well if you join communities in your niche and are active in liking others posts. Pinterest is still the best place to share and get lasting pageviews.