<human>: I found a really sweet male cat outside as I came home from work.  He permitted me to pick him up, so I brought him into my bedroom (to keep him separate from my cat).

He had no collar and seemed a little skinny but otherwise in good condition and really friendly so I assumed he had an owner.  I brought him to a nearby vet and had him scanned for a microchip and they found the owners contact info.

The vet tech called the guy and explained that they had his cat and were open until 6.  The owner explained that he can't get there by 6 and asked if I would just release the cat back outside where I found him.  I should note that I live in a pretty big city.

The vet techs seem pretty appalled that this guy wanted his cat to be left outside.  I told them I would keep him at my apartment and the guy could come pick him up.  I then made the mistake of giving him my address and apartment number.  

I don't understand people who let their cats roam around outside in a city, you're just asking for it to get hit by a car.  

I don't really want to let this sweet little boy go back to a dead beat cat owner who doesn't think keeping his cat safe is a priority.  He's coming to get him in a few hours.  What should I do?

Could you distill the essence of the text into 1-3 sentences?
<bot>: I don't want to give the cat I found back to his lazy owner and I don't know what to do.