In case anyone is interested (I have no affiliation with this event).
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Chant in Renaissance Polyphony Sing-Along Workshop
Chant Camp with Susan Hellauer and Marsha Genensky of Anonymous 4
Singers from Anonymous 4 will discuss, demonstrate, and lead participants in
a chant, then Mostly Motets will demonstrate and sing a related piece of
polyphony with participants. That cycle will be repeated for each of the
chant and polyphony selections. Experienced and inexperienced singers are
welcome. Participants may attend either or both sessions, since their
content will be different. Purchasing tickets in advance is recommended.
http://www.MostlyMotets.com/Visitor/Events