Unfortunately not. All of my guests must have accommodation booked on the night of their tour. Unlike other major airports, ours is not open 24 hours. 
Your safety and your warmth mean a lot to me, and I'm not willing to make compromises here. So when we say goodbye at the end of tour together, even if it's at 3:30am and your flight leaves in two hours, I must have somewhere warm to drop you back off to. 
If you do not have accommodation booked for the night of your tour, your seat will be forfeited and no refund will be given.

There are no exceptions here, so please don't ask via the contact form at the bottom of my website.