The Chinese artist Ai Weiwei has three shows in LA. His new work “Life Cycle” at Marciano Art Foundation explores the state of refugees. He talks to DnA about exile, his roots as an “architect” and why he enjoys visiting casinos. A sociologist argues that only “social infrastructure” will save us from environmental disaster and civic meltdown. And a real estate marketer explains why buzz matters as much as sales in the world of celebrity development.