The City of Williams is now offering ZUMBA for Colusa County ages 5 & up! It is a great way to party yourself into shape and not to mention it is competitively priced with other ZUMBA classes in our County! Instructor: Venesa Perez lives locally in our community. She is an awesome instructor, and keeps the party going with new songs every month! Evening Workouts: 6:00pm-7:00pm Monday – Thursday $53.00 per month. 6:00pm-7:00pm. Monday, Tuesday & Thursday $40.00 per month.