Elliot's Leap Day Birthday Party

You are having a dinner party for eight, including yourself, in a memorable setting. Where is this setting and which seven characters in crime fiction would you invite and why? (Caveat: I added one, for numerological balance.)

For my first topic of 2018, I'll keep in the realm in which I'm currently working. If it's a dinner party for eight, I'd make it the birthday party for the protagonist of my mystery series, Elliot Caprice. It couldn't be a party including me as that would subject me to o...