Rearrange your schedule so you can commute to work, (i.e. - get up an hour or so earlier).

I get in 150+ per week on my touring rig, riding to work and back. On the weekends, I take the kids out with my beach cruiser and run errands around the neighborhood.

My wife appreciates how much I save on gas, auto insurance and payments. The kids and I love our time together and I get to ride to my heart's content.