bring a 6 pack of brewskies.... or a tray of starbucks
then ask if you can get the stuff for free



if it works, then bring them another 6 pack once a month or whatever you think it is worth it for you

when I bought TONS (I mean TONS and TONS) of books from goodwill years ago that made me the most loved guy there (it was coffee, not even starbucks)
grease the palm my friend