Before each run, you need to change clothes, then, after the run, cool down and shower and change again, adding a good 30-45 minutes to the time dedicated to each run. This assumes that it is possible to change and start the run straight from the place where you are, otherwise transit time is added.
I am probably poorly organized, but I find it already difficult to fit my hobby in my normal life of family-work-other interests. The additional wasted time and stress to juggle two activities in a day is not worth the marginal fitness gain. Unless I am on vacation on a tropical resort and bored to death, I always go for 4.