Because Lance is a well-know swimmer, is pretty common people call him to make some publicities about their pool clubs were usually people do swimming classes.

Lance gave some paper to Ren asking him if he was interested, but he denied. Because of his job as a cop he wouldn't have enought time, but he said he would tell other people about the swimming classes.

I thought would be cool do something like that, put two characters that doesn't have too close relationship in normal day stuffs.
Is pretty simple, but I hope you guys like it.