Iota Phi Theta joined The National Pan Hellenic Council after 1980 .
The council 's membership expanded as Alpha Phi Alpha ( 1931 ) , Phi Beta Sigma ( 1931 ) , Sigma Gamma Rho ( 1937 ) , and Iota Phi Theta ( 1963 ) joined this coalition of Black Greek letter organizations ( BGLOs ) .
National Pan-Hellenic Council