Tldr, I am hosting a 12 hour Lan party for 7 adults of mixed gaming prowess and genre preferences. Need game suggestions.

My best friend is getting married, as the best man I have been asked to host a gaming event as a bachelor party for the groomsmen. There will be six or seven of us at this gaming event, one of the groomsmen may not be able to make it.

Linus said a few years ago that a good Lan party should feature older/cheap games that you might not ordinarily play.

I'm going to have a pc set up for everyone. Also planning to do some switch games.

I've never even attended a lan party. If I can get together enough games to fill out a respectable list I thought about having five games picked from the list randomly, then have people vote between those five? I don't know if that's a good idea but it's an idea I had.

How much time would you spend on each game?

I appreciate any thoughts and suggestions. We're going to have a good time because it's all really cool people getting together.