According to two new novels that claim to chronicle (satirize?) our urban lives, our urban lives are incredibly depressing. In the Times this weekend, Ginia Bellefante concludes that between Amy Sohn [/blog/neighbors/the-regressives-of-park-slope]‘s “Motherland” (“a story of midlife shenanigans in Park Slope”) and Karl Taro Greenfield’s “Triburbia”