The mom and pop type stores, maybe people your parents know that have a business. If your parents do business at a particular grocery store, hardware store or even a car dealership. Just have a plan in mind. Try selling the ads for a certain price. Like Large and in the front center $1000 , smaller ones for like $500 with a logo. Then if that is too much, maybe just the names for like $250 each. If you go in and ask for something and you just say things like, I don't know, anything would work, etc... Then it shows them lack of planning( my opinion)
I've tried numerous businesses and stores around my area and I have had no luck so far. Do you have better luck with mom and pop type stores or bigger chains?