Yes, it's a scene, not a sex date.
You can replay it in Adrian's replay menu. "TV and Chill with Adrian and Bai".
There's no gay threesome in the game. With which characters did you imagine one?
There is, however, a very hot bisexual orgy. For that you need to have the gangbangs on Izzy's path, and be romantic with Bai. After meeting Moose and Mal in the park when on a park date with Bai, you can invite Bai to an Izzy gangbang. Moose is pansexual, so MC, Bai, and Moose can have a lot of fun. You also have the option to be bottom to them during the orgy.
