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 from LTT said a few years ago that a good Lan party should feature older/cheap games that you might not ordinarily play. I really like this concept.

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.