What can he say, maybe he's just a simple guy… Who should really get some kind of a real hobby, yeah. Thankfully, Hikaru was accepting his uncertain answer anyhow though, so he can go with that.

"Yes… It's something that's both necessary but also relaxing, in a way. I wouldn't call myself a chef by any means, but even basic meals are nice to have home-cooked." Was it fun, though…? At the very least, right now the thought of it isn't, but maybe it had been for him at some point.
Hikaru was clearly good at socializing and keeping the energy up regardless, though, which is fitting for a bar tender Vincent supposes. He's also kind of glad, because Hikaru is singlehandedly saving this conversation from being more awkward than it could be.
The tea! Vincent blinks a little at the wording of that question, mentally having to adjust to the fact that it wasn't alcohol being talked about. Probably.

"Ah, if you mean tea strength, then as strong as I can get the tea bags I use to get it while staying hot, though I can't say that they're terribly strong to begin with." Cheaper stuff will do that. Also depending on the type of tea in the first place too, of course. "Whatever other blend amounts of things I'll leave to you, though, since you're clearly an expert." Maybe not in tea specifically, but…