answer: Jack's doctor suggested he do more exercise. Lucy invites him to join the health club and tells him some information about it. They'll go there together tonight.
documents: #Person1#: Hello, Lucy speaking.
  #Person2#: Hi, Lucy. This is Jack. Are you still going to the health club?
  #Person1#: Yes, why?
  #Person2#: Well, I went to the hospital yesterday, and my doctor suggested I do more exercise.
  #Person1#: I see. Why not join the club I'm going to.
  #Person2#: Is it good?
  #Person1#: Sure. Wonderful equipment, nice people, and it's not far from my home.
  #Person2#: What do you do there?
  #Person1#: Well, I often start by running, then swimming.
  #Person2#: Does the club offer training courses?
  #Person1#: Yes, basketball, tennis, dancing. You have a lot of choices.
  #Person2#: Sounds great. How often do you go there?
  #Person1#: Usually, twice a week. On Mondays and Thursdays.
  #Person2#: Not bad. I think I can manage.
  #Person1#: Hey, I'm going again tonight. Why not come along with me?
  #Person2#: OK. Where shall we meet?
  #Person1#: I'll wait for you in front of my house at 7:00.
  #Person2#: See you then.