Both Bahrain and Qatar are members of the Gulf Cooperation Council (GCC), but they have a territorial dispute that has led to Bahrain's boycott of the GCC summit convened in the Qatari capital of Doha on December 7-9.
NO one opts out of the Gulf Cooperation Council
( z1 opt :ARG0 ( z2 no-one ) :ARG1 ( z3 have-org-role :ARG0 z2 :ARG1 ( z4 organization :name ( z5 name :op "Gulf" :op "Cooperation" :op "Council" ) ) ) )