Agree with you entirely on the predictability of the film. I could see from the get go that the couple were priming the duo onto something, I [wrongly] assumed they were drug smugglers at first and were priming them to be drug mules. After a realised it was all night of dares, I could sense what really made them tick…

Not a fan of this, rottentomato reviews are consistently unreflective for some reason, should have gone by IMDB. Film critics love this movie but I hated it and it got very predictable. Halfway through the movie you get the jist of how it's going to escalate and where the dares are heading.