One way of getting this information might be to send an online survey out to your single adults asking them these questions -- try
Online Survey Software Tool - Create Online Surveys - Zoomerang for a free account. Or, you could do a paper and pen survey when you see them at Church.
One activity I really liked was when everyone brought pizza ingredient stuff to FHE, and then we put everyone in groups to make the pizzas. There wasn't much competiton or anything, we just enjoyed working alongside each other. I met my wife in that activity and fell madly in love with her.