Coffee's pretty much a staple addiction... errr ... food for most bicyclists. So are energy drinks and come to think of it - anything edible! Donuts, pie, Power Bars, subs, french fries, ice-cream.... you name it (just don't forget ice-cream)!
So coupons at any place like Tim Hortons or other pit-stops would be great!

As long as there are bike racks provided.