I've been tossing around the idea of starting a group of people who are committed to buying Bitcoin every month. Can be a small portion, like 5$, or however much people can afford (I suppose it would make sense to use higher amounts for fee reasons, though). I myself have set up a monthly wire transfer from my bank account to Coinbase and a recurring purchase of Bitcoin every 1st day of the month. This is really simple, and you keep investing and $-cost-averaging your BTC purchases.
Who's in?
It does not have to be a club. Everybody who is serious enough to build a treasure with Bitcoin will always set aside a tiny portion of his regular income to buy Bitcoin. And not just Bitcoin, it could be divided among solid altcoins as well. The better club is HODL club. Not everyone who buys Bitcoin is committed enough to HODL them for a long time. Many are emotional owners. They cannot HODL when the times are bad. HODL club is made up of stronger Bitcoin supporters.