The Downtown Optimist Clubhouse is located at 1201 Grand Avenue, just off Business Loop 70, one block west of the intersection of Providence and Bus. Loop 70. The Club’s mailing address is P.O. Box 1959, Columbia, MO 65205. We use the space for monthly Board meetings, and it also serves as the headquarters for our annual Christmas tree lot sales. If you are interested in reserving the clubhouse, please see the calendar availability below and click HERE to see the clubhouse use policy form.