I don't know if these are the same group or different but it might be fun to sketch with them.
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Bryen hosts events on Meetup: the next event is 10/3/19 at 6pm at Milwaukee Art Museum
https://www.meetup.com/Milwaukee-Sketch-Club/events/264653436/?gj=co2&rv=co2&_xtd=gatlbWFpbF9jbGlja9oAJGI1NDRmOWI1LWYwNTktNGI4Mi1hY2YwLWYwMTVhZTAyYWFlMQ
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I think this one on Facebook is hosted by Mike Rupsch?
https://www.facebook.com/groups/312714792529179/
Welcome to Urban Sketcher MKE! We are the local Milwaukee chapter of Urban Sketchers: http://www.urbansketchers.org
All are welcome to join our local sketch events, no matter your skill level! We meet up regularly to create watercolor sketches at location in and around Milwaukee.