Bethesda-based Marriott International Inc. (NASDAQ: MAR) announced Friday it has an agreement to buy Elegant Hotels Group, which owns and operates seven hotels and a beachfront restaurant on the island of Barbados. Per a release, Marriott’s all cash offer values Elegant at roughly $199 million, including its $68.9 million in total net debt. Elegant’s seven hotels total 588 rooms, making it the largest luxury hotel owner on the eastern Caribbean island.