Single straight men of Seattle, this is the movie for you. If a lady has been giving you no play (date after date), she will melt for you after watching The Romance of Astrea and Celadon. This is no exaggeration. Go and see for yourself. Set in fifth-century Gaul, the movie has a lightness and erotic magic you'd expect from a story that has a hidden castle, a mysterious river, an enchanted forest, lively nymphs, lost shepherds, and helpful druids. It's hard to believe that the French director of this visual feast, Eric Rohmer, is 88. (Northwest Film Forum, 1515 12th Ave, 267-5380. 7 and 9 pm, $9.)