Given the jaw-dropping price tags involved, this fact is pretty academic for most New Yorkers, but you may be interested to know that it is common practice for ultra-luxury hotels to set aside a few floors as ultra-luxury condos. It's not exactly clear who is laying down the money necessary for the luxury condos at The Mark or The Residences at The Mandarin Oriental, but neither is it difficult to see what's appealing about an apartment within a luxury hotel -- from the full-service experience to the high-end amenities, anyone who has ever stayed in a fancy hotel is surely familiar with the wish to stay forever. More rare than that, though, and notably more welcome for those New Yorkers who can't cut an $18 million check for a three-bedroom spot at The Mandarin Oriental -- so, basically everyone but A-Rod -- is a luxury hotel setting aside floors for luxury rentals. The just-opened Eventi Hotel at 835 Sixth Avenue, between 28th and 29th Street, is doing just that. The rental apartments at the Eventi will be known as The Beatrice, and are located on the top 24 floors of the hotel. While The Beatrice is still three weeks shy of its leasing date, early chatter on this new Chelsea luxury rental project suggest that The Beatrice will be one of the elite Chelsea luxury rental listings on the market.