Missionary position & Singles bars

[Bapopik at AOL.COM]

   From PLAYBOY, August 1967, "The Playboy Advisor," pg. 29, col. 1:

   My wife is reluctant to experiment; anything other than what the Trobriand Islanders call "the missionary position" is repellent to her.
(...) --D. C., Honolulu, Hawaii.

   From PLAYBOY, October 1969, pg. 38, col. 3 (the bars Friday's, Thursday's, Wednesday's, and Tuesday's are reviewed--ed.):

   Friday's (1152 First Avenue), the "swinging singles" bar that started off the rearranged calendar, serves some food but specializes in draft beer.