EntertainmentMike Greenberg is a “guy’s guy” — he co-hosts the ESPN show “Mike & Mike in the Morning”— so when he decided to write a novel from the perspective of three women, he knew he’d have to rope in some “gal’s gals.” To “get things right” in his recently released All You Could Ask For, Greenberg told me, he formed the world’s most homegrown focus group: his wife, his agent’s wife, and their female yoga instructor. But there’s one vignette …