Like the despised fruitcake that is passed from one generation to the next in Gary Apple’s hard-to-digest musical, Christmas in Hell, the show itself is an amalgam of strange ingredients. Sometimes sincere, usually madcap, but hardly ever having to do with Christmas, it is the tale of an 8-year-old boy mistakenly sent to Hades and the father who has to drink some Clamato to get him back. With one song that rhymes “Jesus” with “Chuck E. Cheese’s,” and another composed almost entirely of variations of the F-word, some in the audience may find the show in bad taste. With references to Charles Manson and Leona Helmsley, others may simply find it stale.