They just want to use his apartment. They never said he was invited.
My place'll be cramped if we get three people drinkin' in there.Wonder where we should go.
Invitation
Oho.A'right, so we'll drink as a threesome next time.Sounds good.The usual bar's fine, right?They ain't too keen on humans there.Hey, I thought of a good spot!His place has more room than ours.'Scuse us.Whoa, what-the-what-the!?