Anything larger than a small bag or purse will have to be checked in and collected on your return from the top. You'll also have to check in strollers. No food is allowed, and no pets – sorry dogs and cats, this one's for your humans only!
If you have a booking at Atmosphere, remember to wear your evening cocktail dresses, skirts, dress shirts, pants, suits, etc. The top hotels won't allow you to enter in shorts or tank tops. During the day, on all other floors, you can wear what you normally would.