Sin City - Sin City, #1

Las Vegas, 1966. There are parts of Sin City the neon lights don't reach, and only the desperate and dangerous venture into the city's seedy backstreets, where gangsters rule, the floating poker games never stop, and people disappear without a trace. Ruby Gordon is desperate. She has nowhere else to go when her brother opens his home to her. He runs an off-the-books juke joint, and she is fascinated by the most dangerous - and handsome - of his clientele.
Tim Kelly is dangerous. His father never achieved notoriety with the Chicago Outfit, but Tim has aspirations to strike out on his own. He has plans, and they don't include a naive newcomer. Jake Wheeler is both. The Airman-turned-rodeo-rider is as gorgeous as he is foul-tempered, and he's Tim's not-so-friendly rival. When he notices Tim's interest in Ruby, he's determined to derail Tim's plans. The three of them are on a collision course, but there's only one rule in Vegas: The house always wins.
This is a crime/love story/saga set in 1960s Las Vegas. If you like S. E. Hinton's The Outsiders, check this out.