OT: Tipping contractor for driveway refurbishment?

[cbelt3]

Usually the kids that do the work get beer or other beverage as appropriate. I once got a good 20+ feet of asphalt driveway paved for a bottle of slivovitz, a case of Bud, and $20 cash a head. The road crew had asphalt 'left over' from doing the street in front of the house.