Question: do they end up together in no strings attached

Answer: Yes, The end credits show an epilogue in which Alvin and Lucy are in a relationship, and are in a restaurant waiting for Adam to arrive to tell him. Adam's roommate (Jake Johnson) and Patrice are in a relationship and are shown meeting his two dads. Vanessa had told Adam that old people scare her and she is ridden with anxiety when she is trapped in an elevator full of senior citizens. Adam and Emma are seen kissing in the park. Sam and Shira are in a relationship, but he wants his freedom and isn't pleased when she reveals that she's already been seeing other men. Katie is having a baby and Emma is the delivering doctor. Guy lures a nervous-looking Sam into a hospital room. At last, Adam and Emma are shown peacefully sleeping together.