How should one do it? When should one do it? Where should one do it?

There's not really anyone I'm particularly interested in, but at the same time I want to get into the dating world. I'd rather just take some, almost random, person out for coffee or lunch or something of the sort, without necessarily having to get to know her before hand.

Now normally I'm not like this but I feel crazy and willing enough to maybe give it a shot.

Any advice? Or is this insane and improbable? Will I be refuted instantly?