1) go to a place that sells mattresses (whether it be a the mattress department in a department store[make sure the department is near an exit] or a dedicated mattress store) and jump on all the beds you can before the people try to kick you out...do it fast, and than when they run to get you, you run out with her and keep running. shell be cracking up and so will you. youll score big points cause shell probably NEVER forget it.
2)walk into a random hotel with her and just walk stragiht up to the free breakfast or lunch or a dinner or wahtever and just sit down and eat with her...it doesnt sound to exciting but when youre both sitting there with the prospect of being caught. it becomes amazing. and if u play your cards right...the hotel room is wihtin walking distance
3) go to a local park...not just an open park, i mean one of those kiddy parks with the swingset and monkey bars and challenge her to an obstacle course.
4)set up a flashlight against the wall and have a hand puppet show...you can make the hand puppets do "some things" and than you too can copy them
5)walk into as many diffrent stores as you can, each time pretending to be a couple with a diffrent backstory and preferably a diffrent accent and just have fun
the only one ive done so far is number 2...and its spectacular