Lend a Helping Hammer - S4.E4

Hammer meets a waitress at the Stadium named Taylor and tries to get her to attend the school's upcoming dance with him. After she continuosly turns him down, Hammer won't give up and follows her to a homeless shelter, where he thinks she's volunteering. He later finds out that her family is homeless and living in the shelter. The gang decide to try and help her father find a job and donate the money raised from the dance ticket sales to her family instead of buying new uniforms. However, when Hammer announces the change in plans for the money at the dance, students demand refunds, and Hammer accidentally lets it slip that Taylor's homeless and that's whose family the money is going to.