It refers to a bunch of people who gather regularly in a coffee shop for a gossip session.

There are a number of online websites where one could purchase specialty Christmas coffee. Two such websites are Klatch Coffee and The Breve Coffee Company.

I think Klatch is the only one 9 Maiden Ln, New York, NY - (212) 227-7276

A coffee roaster is similar to a coffee machine in which it can brew coffee. This usually produces very strong coffee. A coffee grinder is a device used to make ground coffee from coffee beans.

That is a very difficult question to answer, but here are a few (not all) answers.

Collective nouns for witches: Coven, convocation, circle, heath, hearth, grove, or gathering.

Other reasons why witches gather: celebration, rite, rite of passage, Sabbat, Esbat, ritual, coffee-klatch, study group, or gathering of friends.