I will play. My goal is to only drive our truck one day a week but we alternate who bikes so someone always has my fuel efficient car. I will say minimum one day, max is never more than 2. My husband also tries for 2-3 days and the off day mountain bikes. We use the ride home as exercise so we kind of argue over the balance. Neither of us wants to get up early enough to park and ride and we live too far away to ride the whole way.