Because the man needed help
The best revision would be “She met her friends at the hotel’s bottom floor, which is the lobby, so that they could head over to the swimming pool for a cool, brisk swim”.
Indeed, this sentence is grammatically and syntactically correct since it divides the utterance in smaller unites of meaning which are completely clear and unambiguous. Additionally, its construction is the classical subject plus predicate which further facilitates comprehension.
Uuuuuuuuuuuuuhhhhhhhhhhhhhh burger?
