SFist Jenna sez....: Get your learn, dessert, dance and drink on at these Tuesday haps around the city: Reading & Book Signing: A.M Homes, (author of Safety of Objects, Music for Torching and The End of Alice) reading from and signing her latest book, The Mistress's Daughter, about her horrible biological parents, tonight at 7 pm. Booksmith,1644 Haight St. Get there a bit early to take advantage of the free cone day at Ben &......