Listen to this !!!
I used to work in a shop. Let me tell you the way to make friends. Those guys that load the buckets into your car for you.... give them each a $10 bill. You come back 2 or 3 times doing that and
they'll start calling you at home to tell you when their bucket is full.
If their boss says, "Don't save those", then they'll stockpile them in the back room or under the bench. If the world goes to zinc, they'll still be removing lead wheel weights for the next 5 years. For any kind of regular tip they'll sort the lead ones out for you. They'll do anything for a tip of that magnitude. To them that's 2 free lunches.
Walk a mile in their shoes. All they hear is complaining customers with gone-bad tires, and flats making some woman late for hair appointments. You come in there being friendly and handing out tens, you'll have friends for life. They won't care what the law says. A ten speaks far louder.
Heck, for a 6-pack they'll, wash your dog, change the diaper on the kid, wax the entire car,
and put the lead wheel weights in your trunk. You think that's something? You should see what they'll do for a bottle of Jack Daniels !!!