I have had some great classes at the DuPage Art League in Wheaton, IL. The pictures below are class mosaics. The first two are from the second class of a two week workshop. The last picture is from a one hour intro to Zentangle session.
There will be another two week session in October on the 19th and 26th. Contact them to sign up.
I always find it amazing how I can teach the same tangles and the students come up with such exciting tangleations.