I do wherever the mood takes me. I have been using my older Cathe's lately. I love Pyramid combo from the Intensity series, Hi Reps, some Jari, some KCM (Weights & NYC). I like Rob Glick's, Power Fit Circuit Training (forgot the name). Not a real Rob Glick fan, but its pretty good.
And I am finding that controlling my Lab pup on her leash when I walk her has become quite the upperbody workout. Jeesh!
Has to get to every critter and dog she sees and smells. Sweet dog, but she is strong!!!