Complex sentence: The seventh floor houses the Gravity Bar, the head of the pint of Guinness formed by the atrium, where visitors may claim a complimentary pint of Guinness and enjoy the 360 degree views over Dublin City.
Split into simpler sentences: The seventh floor is dedicated to the Gravity Bar, and also forms the head of the giant pint of Guinness formed by the atrium. The Gravity Bar offers a place to relax, enjoy a complimentary pint of Guinness and enjoy the 360 degree views over Dublin City.