I have not yet tried this. However, I have noticed that Ameriprise uses this approach. You set up a fish bowl in a restaurant for people to either drop their business card in or fill out an entry form for a free group lunch. The Pitch: Lunch is free in exchange for you listening to a brief presentation regarding something that everyone needs, INSURANCE (by attending you are not required to purchase anything its just food for thought). Now, would it be appropriate to set the lunch to a 6 person minimum, to maximize your investment in the lunch? Are there any other requirements that would be appropriate? Is adding requirements appropriate at all?