I need to make up a workout schedule that includes both strength and aerobic.
3 days aerobic (perhaps one not in the gym) and 2 days strength.

The strength workouts could be done at lunchtime.

Perhaps
MWF - aerobic
or MWS when Trek's Friday class starts
TTh - strength

Trek or Yoshi can be walked afterward
Yoshi has class on Wed
Trek will have class on Fri

Yoshi needs time to occasionally watch dogs (like at Agility Trials or the dogpark).
Trek needs to get out on a trail of sorts or go to a dogpark (weekend?)