This is a vent for all the coffee shop owners in the world. I know you didn't ask me to stand up for you, or speak out, but I am going to anyway!
Coffee shop patrons: Clean up your damn dishes. Don't assume the coffee shop has someone to do it for you. Especially if they have visible garbage cans and busing tubs. Get it together people! Half the time another patron, especially in a busy shop ends up cleaning up your nasty left over garbage with half drunken lattes, and icky food traces.
If you live like that at home, I don't care! Don't bring your nasty mess out in public.