That's the thing, I can understand wearing Vans canvas shoes to a date (definitely not a first date), depending on where you're going and what kind of person you're dating. Really, what he wants calls for two pairs of shoes. In your situation, I'd get a pair of black oxfords for the interview, and a pair of black loafers like Shem posted for the date. Unless you're going to a restaurant with a strict dress code, oxfords are probably overkill for a date (although I doubt it would work against you).
Also, just because a lot of mid 30's/middle aged men wear sneakers every day as regular daily shoes doesn't make it right. Wearing sneakers around looks pretty bad (why do so many 30-somethings wear jeans, a polo, and colourful sneakers?), and going into a job interview with them on is a really horrible idea. I don't necessarily think you need to be wearing leather loafers at minimum for anything that isn't athletic/boating, but if you're going to wear canvas/boat/skate shoes, they have to be tasteful and more conservative. Also, if you're wearing anything more formal than a pair of jeans (i.e. trousers/slacks/"dress pants"), you pretty much have to default to some kind of leather shoe. Other types of shoes can work, but not in the date/job interview context.
Tl;dr: Buy a pair of black leather oxfords and be done with it. You should probably buy a pair of black leather loafers too. And for God's sake don't buy something like those Vans or Nike shoes (or those Pumas that Dean J posted) and expect a job interview at anywhere better than McDonalds to go well.