For Call of Duty: Black Ops on the Xbox 360, a GameFAQs message board topic titled "Planning to host a LAN party".

For Call of Duty: Modern Warfare 2 on the Xbox 360, a GameFAQs message board topic titled "Anyone try a 360 LAN party yet?". Whatever happened to LAN parties and stuff with Xbox I miss the old days when every fps or multiplayer game on xbox had lan party options. Halo was a great example of this. Inviting over REAL LIFE friends to your REAL HOUSE and they brought their own consoles and you move the furniture connect the consoles and everyone has private tv sets and we all play multiplayer together in the same room and have a good time. just gaming and chillin. 3 Ways to Connect a Wireless Xbox 360 Controller - wikiHow

Connecting over wifi with the xbox one doesn't seem to work, so they all need a wired connection to the router. As far as whether you need a physical copy or not, I'd say it probably shouldn't matter, but who knows. I'd definetly suggest giving the set up a dry run before your party just to make sure everything works. Good luck to ya :D

Aug 27, 2013 My Xbox 360 Lan Party - YouTube

The set-up is 8 xboxes and 8 separate TVs all running off a switch, we even tried 6 of us online and the connection held up well. If anyone in the UK might be interested in …

LAN play between Xbox One and 360 possible? | AVForums May 28, 2017 LAN party on xbox 360 over around 600 meters