Director-screenwriter friendo to HE: ‘I know you appreciate old-school class, etc. Mister O’s is a retro-designed supper club a la Mad Men and ’60s Rat Pack style in the Valley. Since Universal and other neighboring studios are making it additionally difficult for picketing writers and actors by doing things like cutting down shade trees and blocking sidewalks, this upscale restaurant is offering itself as a cooling station…and it’s a very cool place to hang and cool down.”