Beatsaber lobby in 30 minutes. 

I LOVE [spoiler]CAM[/spoiler]ELLIA 
The only songs I have in my library tonight are Camellia. If you want something else you'll have to take a turn hosting.

Install base mods using mod assistant in the OP and grab the MP mod here: https://github.com/Zingabopp/BeatSaberMultiplayer/releases. 
Also, if you haven't played in a while or have troubles you should probably do a clean installation https://bsmg.wiki/support/#clean-installation.