Planning to be Spontaneous

It has occurred to me today that since leaving a college lifestyle...I haven't been as spontaneous as I used to be. I don't just go to a fast food joint at 10:30 at night anymore. Or call up someone to see if they want to catch a movie in 5 minutes. Everything has become planned out in advance by about a month! I think I'm going to need to plan a spontaneous day in June. Or does that defeat the purpose?