Efeso Collins' wife, daughter and elders, were told they could not sit where they were because it was reserved for council guests.
When they told an usher they were council guests, no one believed them, Mr Collins said.
The incident left him "infuriated [and] deeply embarrassed", he said.
The council had apologized for the incident and denounced the conduct of the usher, but Mr Collins said today that he wanted the question of racial discrimination addressed properly.
