By Rachel Aydt Last Friday night, at the Bowery Poetry Club in Manhattan’s Lower East Side, the book GirlBomb: A Halfway Homeless Memoir, by Janice Erlbaum, was being celebrated on its 5th Anniversary by roughly fifty people who appeared to have been deeply touched in different ways by the memoir. At its root, Girlbomb (published by Villard in 2006) is a story …