What can we infer from the conversation? Where does the conversation most probably take place?

W: We are going to change our meeting from Monday to Tuesday.
M: It’s all the same to me.

W: What a surprise to see you at the supermarket! I thought you always ate in restaurants.
M: The restaurants cost too much. I usually eat at home, and I’m a good cook. If you like, you can come to have supper with me tonight.
W: That’s a good chance, I won’t miss it. Thanks a lot.