London (Reuters) - South African casino operator Gold Reef Resorts agreed to be acquired by a group including Ethos Private Equity and Goldman Sachs for 34 rand a share, or about ZAR 9.85 billion (USD 1.37 billion). Gold Reef, which operates the Gold Reef City theme park and casino in Johannesburg and other casinos and hotels around the country, said on Monday after markets had closed that the deal implied an enterprise value of ZAR 11.6 billion.