The West Virginia Family Foundation says it won't challenge a state law allowing four local elections to decide if table games will be allowed in their county.
The group had announced in June that it would ask a federal court to overturn the law.
But spokesman Ray Lambert says further research showed that a federal lawsuit probably wouldn't be successful.
The state Supreme Court declined to hear the group's case in late May.
The group is now focusing its efforts on Saturday's referendum in Kanawha County.