Tam O' Shanter is the oldest restaurant in Los Angeles. It's been owned and operated by the same family, in the same location, for almost a century. They are known for their prime rib slabs, sandwiches, and A-list clientele, from Walt Disney to Tom Hanks. It's even been featured on shows like The Office, MadMen, and Glee. Insider's Mikala Jones-Fielder goes to Atwater Village to visit the long-standing Hollywood hangout.