A broad, hit-and-miss Australian youth comedy, set in the title hotel in “Niagara Smalls.” Some of it looks like a TV commercial, and the characters' motivations could have been generated by a computer, but the cast—Ray Barrett, Julia Blake, Simon Bossell, Saffron Burrows, Pippa Grandison, and Aden Young—is attractive and energetic. Written and directed by Craig Rosenberg.