Playhouse members who attend the season opener of “Fools,” a comic fable by Neil Simon, are in for a real treat. The show opens this weekend on September 13 with performances at 7:30 p.m. on Friday and Saturday, and a matinee at 2:00 on Sunday. The same schedule will be followed next week September 20-22. While the play which opened in 1981 was only mildly successful on Broadway with a 40…