The Open Championship venue of Muirfield is East Lothian Jewel, having hosted the Open Championship on 16 occasions most recently in 2013 when Phil Mickleson became the Champion Golfer for the year.
North Berwick is a fabulous golf course with marvellous views over the Firth of Forth. A championship course it is a final qualifying venue for the Open Championship and has hosted both the gents and Ladies Amateur championships.
Gullane has 3 courses simply maned numbers 1. 2 and 3. Gullane recently hosted the Scottish Open on the European Tour
Add in Dunbar, The Glen at North Berwick and Craigielaw and you can open your entire Scottish golf trip playing East Lothian Golf Courses.