In Alan Ayckbourn's "Bedroom Farce," a party's going on but we never get to it. Nor do three of Ayckbourn's eight characters who are more or less marooned in their bedrooms. The other five, two of whom are giving the party, make only sporadic visits to the festivities which are taking place downstairs. The comedy is set in three separate bedrooms, one of which belongs to the evening's host and. The other two...