The actual "Cliff House" hotel is located in Caumsett State Historic Park on Long Island.
The sweatshirt that Devon wears on the yacht is from Anderson's Custard Stand in Tonawanda (Buffalo), NY, family-owned for 80 years.
When she meets the yacht captain, Devon introduces herself as "Christina Grey, a tech millionaire from Seattle"-a reference to the main character in 50 Shades of Grey, Christian Grey: a tech billionaire from Seattle.
Jenn Lyon (Cloe), says that she was a nail tech in Florida. In the show Claws, she was a nail tech in Florida. Similarly, Ray repeatedly gets called a nurse and Josh Segarra played a nurse on The Other Two.
The GPS coordinates shown on the Port Haven sign in E3 (41° 20' 41.4816" N, 69° 45' 33.6168" W) point to a real-world location in the Atlantic Ocean, approximately 6 miles east-southeast of Nantucket, Massachusetts.