Took me 244 seconds. Then again, I did look at the walkthrough. I'll help you guys a bit. Go into the men's bathroom. Look in the second stall for a key. Go to the lockers and put in the code 162.
Take the coat hanger. Use the key to go into the women's bathroom. Use the coat hanger to open the second stall. Take the quarter. Figure out the rest on your own or see the walkthrough.