Good (see the
Dwarf House/Chick-fil-A examples here).
A coffeehouse did a Golden Mug program. They bought special travel mugs and gave them out to people in the community who typically have external meetings (real estate agents, financial planners, networking group members) and community leaders (ministers, president of the Chamber).
The mug is good for free drip coffee (some folks do it for $1). The goal is to have these people hold afternoon or morning meetings at the coffeehouse. There are usually two or three people, so the coffee is a loss leader. Works really well to get a larger share of wallet among those who meet out.