I say get some wings and pizza tbh lol
And I say a planned game like cup pong . Do you have that on the list ?
There’s a fun board game called worst case scenario maybe try that ?
Do you guys have drinking card games? Or make a game you have into one. As for decorations grab some helium balloons and a birthday banner.
And they like planned games* this isn't my thing as I'm an introvert and I'm also under 21 so I don't know basically anything about drinking and haven't been to any adult parties let alone ACTUAL parties. Help? 🥲