"College Campus" What is the purpose of this conversation?

Narrator: Listen to part of a conversation on campus between two students.
Man: I didn’t see you at the International Talent Show.
Woman: No time for that kind of thing.
Man: You mean you don’t belong to the ISA?
Woman: The ISA?
Man: International Student Association.
Woman: Oh, no. I don’t belong to any clubs.
Man: But this isn’t like a regular club.
Woman: How so?
Man: Well, we have a house~ You know, the brick house on fraternity row and...
Woman: You live there, right?
Man: Yeah. I moved in last year. It’s really inexpensive because we take care of the house
   ourselves and we cook our own meals.
Woman: That sounds like it would take a lot of time.
Man: Not really. There’s a list of chores posted every week, and you can choose something
   you like to do, so I usually put my name down for yard work. I like being outside so it’s
   fun for me.
Woman: But you have to cook too, right?
Man: Okay, it’s like this: twenty of us live there so every night two of the guys cook and two of
   the guys clean up, so you only have to cook about once a week and clean up once.
Woman: What about breakfast and lunch?
Man: Oh, well, you’re on your own for that, but the dinners are just fantastic It’s like eating in
   a different ethnic restaurant every night~ You know, because the guys are from different
   countries.
Woman: That sounds good.
Man: And it costs about hatf what it did to live in the dorm. But really, I’m doing it because it’s
   a great experience living with people from so many different countries. My best friend in
   the house is from Korea. My roommate’s from Brazil. And I’ve got friends from... well,
   just about everywhere.
Woman: But you don’t have to live in the house to belong to the club.
Man: No, no. There are about a hundred members in the International Student Association.
   Only guys live in the house, but there are a lot of women in the association. Woman:I wish I had time to do it. It really sounds interesting.
Man: You’ve got to relax sometimes. Anyway, we meet at the house the first Friday of the
   month from seven to ten. We have a buffet dinner and after that, we have a short
   meeting. That’s when we plan our activities, like the talent show and picnics and dances.
   Then a lot of the people stay for music and a party, but some people leave after the  Q21
   meeting.
Woman: So it’s only a couple hours a month.
Man: Right. Listen, why don’t you come over next Friday for the meeting, as my guest, I   
   mean. You have to eat anyway. And if you have a good time, you can think about joining.  Q18
Woman: Next Friday? Well, I don’t know...I usually study on Friday night, but... I could take  Q22
   a break...Sure I’ll come over...but I might have to leave early.
Man: Great.