I think the most popular free item around here is condoms or coupon books haha. I really don't ever pick up anything up, but they always have free tshirts, candy, food, condoms, etc. I also know during Valentine's Day they give out these packs from the Shape office that have condoms and dental dams in them. When I first learned what a dental dam was I was um, a little embarassed to say the least.
But I remember my old roommate and her boyfriend always had a ton of those around. Yikes.