Leave this message:
"Hi. Um, I don't normally do this, but I just really enjoyed our conversation and meeting you the other day, so I was wondering if maybe you'd ever want to go out for a drink. Or if you don't drink, for coffee or if you don't like coffee, maybe tea or water. I like water. So um, yeah, call me back, er whatever. Or not. Uh, whatever's cool. K, have a good day. Talk to you soon, maybe."
Yeah. I like water. I said it. Fucking whatever. He's the weirdo for not liking water.