Here’s a sweet treat for your candy sack: a classic musical moment from Frank Oz’s “Little Shop of Horrors.” Ellen Green warbles about her longing for a better life in sunny suburbia. (“I cook like Betty Crocker, and I look like Donna Reed…”)   A friend of mine once wryly noted that he thought it was the scariest part of the whole movie.  If you’d like something with a little more teeth, may I suggest a visit Deacon Scott Dodge’s joint for a little Warren Zevon?