anybody taken improv class before? where can i find one nearby mcmaster?

Staircase Theatre offers Improv classes on Mondays and Tuesdays this month.
http://staircase.org and check out Upcoming Events

It's a short bus ride from Mac off of King St.

There is a McMaster improv team which runs during the school year. It is open to join and a very fun community. Usually twice a week as well.

how do i join them?