While I am not familiar with Karaoke or what it is exactly...

[Really, what even is karaoke?]

If you are in need of assistance with serving and mixing drinks I can lend a hand. I have extensive experience with that trade since I do run a tavern back home.

[A bit more than just 'run a tavern' that but Diluc is modest and isn't yet sure what to make of this world and everyone that is showing up within it. At least working with something he knows well seems like a good idea.]

Also there are non-alcohol drinks I know how to make for those unable to indulge in alcohol.