F.B.I.-run gay bordello in New York

In his obituary today in the NYTimes, we are reminded that C.A.Tripp's ground-breaking 1975 book, "The Homosexual Matrix," reported that during World War II the F.B.I. ran an all-male bordello in New York "staffed with homosexual agents charged with extracting information from foreign sailors."

Sounds like a pretty posting for patriots, but wait, if this was during the war, why did the feds have to go to such trouble to get information from friendly navies? Was it just for fun? Since I couldn't be there, I should read the book.