Chi Lambda Elizabeth City State University apparently also used "Trefoil Club".
There is a picture of those in the trefoil club in the 1972 and the 1975 Elizabeth City State University Viking yearbooks.
http://www.archive.org/stream/ecsu00001972eliz#page/58/
http://www.archive.org/stream/ecsu00001975eliz#page/60/
Note, that these yearbooks and the ones around that time (just change the 1972 or 1975 in the URL to logical values) are a good place to verify the pledge clubs of other various groups...
(from 1974 unless noted)
APhiA - Sphinx Club
AKA - Ivy Leaf Club
PBS - Crescent Club
ZPB - Archonian Club
OPP - Lampados Club
DST - Pyramid Club
KAPsi - Scrollers Club
SGR - Aurora Club (1975)
Xi Psi Chi - Pawns (note, not Pawns Club) (Not familiar with this group)
GSS - Omicron Club
GPhiG - Swanxmen
SPhiS - Ladybugs
IPhiT - Centaurs
(Note, unfortunately Chi Lambda at the time also illustrates how tough it may be to make *certain* that a chapter is inactive. Chi Lambda was declared inactive at the July 1987 APO Board meeting. There are Pictures and pages for Alpha Phi Omega all the way through the 1990 Viking yearbook.)