“Babysitter’s Black Book” (** out of four) was a predictable drama about four teenage friends who start a babysitting business to save up for college. When this just isn’t cutting it, they expand their ambitions into opening a prostitution business! Shades of “Risky Business” but unfortunately there’s no Tom Cruise or Rebecca De Mornay here. Allegedly inspired by a true story but it should have inspired a juicier movie.