It is good to announce your intention to form a meditation group here, but in reality the members will come mainly from outside the internet in your local community and network of friends and acquaintances. You can also advertise by putting a flyer up in local yoga studios, new age stores, etc. But starting small in the home is usually best -- one step at a time. This is how AYP will overflow from the internet into the broad society, and I am all for it as you know.
It is a great thing to do for your community. Outpouring divine love...