“Weekenders” (** out of four) was a curiously uninvolving melodrama about four twentysomethings (Peyton Michelle Edwards, Erik Bloomquist, Ehad Berisha, and Maggie McMeans) who have a scheduling mixup and wind up at the same air b&b and try to get to know one another and come to realize they have more in common than they all might expect. Sincere and likeable performances do all that they can to keep this flimsy story afloat but it’s mostly a fizzle. Yet another imitation of “The Big Chill” that turns out to be a big nothing. Co-star Bloomquist also directed, co-wrote the script and story, and also co-produced and co-edited.