I'm kinda new to working out (in practice, in theory I've been readin up a long time now ).
Been doing 3 times a week Body Pump and 3 times a week a 40 min cardio along with some abs and back excercises.
Anyway, to the point. Of those 4 months that I've been doing Body Pump I skipped stretching about 6 times because I was late. The day after I was in a lot of pain (I generally don't get any pain after the workouts), so I've learnt my lesson. Never skip stretching I hate anecdotes as much as the next person, but this is just my 2 cents.