(09 Aug 2015, 12:57 pm)aureolin wrote I'm the same. I always just say I've got no change, but don't mind going and buying them a McDonalds, Greggs or wherever is nearby. 9 times out of 10 this will be refused though bizarrely.
Done this loads of times. Sometimes I've had my offer refused but, on most occasions, it seems to have been appreciated. It's usually pretty easy to tell who's genuine and who's not in my experience.
I also try and make a little conversation when I can.