Start by offering them something from the machine. Push off from this if it helps: handwriting on envelopes.

There's a coffee machine down the hall if you can call it coffee. I'm getting something, want anything? Fair warning it comes out either scalding or lukewarm, no middle setting.

Also — sorry, random — I was staring at that stack of mail on the desk over there and got stuck on how nobody writes envelopes by hand anymore. Mine's all typed labels. Feels like losing something, I don't know.