Let's do this again
let's do this again (sometime)
We should do this together again at some point in the future. I really enjoyed getting lunch with you, Dan. Let's do this again sometime. A: "I had no idea professional chess would be so interesting to watch." B: "Neither did I! Let's definitely do this again."
Let's do this again (sometime).and We must do this again (sometime).
an expression indicating that one member of a group or pair has enjoyed doing something and would like to do it again. Bill: What a nice evening. Mary: Yes, let's do this again sometime. Bill: Bye. Mary: Bye, Bill. Sue (saying good night): So nice to see both of you. Mary: Oh, yes. We must do this again sometime.