Tell them that because of their help you now have three more parties and would he or she like to join you and do one or part of one of the meetings, etc., etc. Although most of you are probably involved in or looking at a few online opportunities, I think that it's important to get things happening offline also. It's really a lot of fun and things can move a lot quicker. In a business such as mine I can work really hard for 12 months or do nothing at all for three years and probably get as much money. My business cost me nothing to join and I only pay for products I personally use.
House parties are great.
It's your opportunity to do some heavy recruiting and break all sales records. For things to change, you have to change.