Wrestling has been at all bar one of the modern olympics, and it is one of the traditional sports. Wrestling has produced many interesting moments, from the origins of naked Greco-Roman wrestling all the way up to Kurt Angle winning the gold medal with a broken freaking neck in 1996. I'd need to pick a venue befitting of such a grand sport.
Location - West Of Scotland Rugby Club Ground
Wrestling : Home of the West Of Scotland Rugby club, the Braehead ground can seat many people, and there is plenty of room to add more seating. If wrestling greats such as Hulk Hogan, Rowdy Roddy Piper, The Rock, Stone Cold Steve Austin and Paul Birchall can wrestle at outdoors events, then so can the olympic wrestlers. I believe they call it alfresco.