One of the most touching aspects of this beautiful story is that Zak doesn't even know how broke and in debt Iris is, and yet he still says nice things to her, and may one day even tell her his last name. He is constantly lifting her self esteem, which he found wadded up in the dust under a table at Jerry's after years of being stepped on by Wilbur Weston.
Here's something else I found wadded up under a table at Jerry's:
Zak's Playbook: 1) Find a female with horrible self esteem. 2) Make her feel young by inviting her to do young people things. 3) Have friends make fun of her. 4) Compliment her. Say nice things. Tell her she's beautiful. 5) Hug her in the car.