He has also spent a decade as general manager Hakkasan Group, as well as launching HKK in the City in 2012.
Hastings said: “I’m incredibly proud to join the team at City Social, to help redefine the business to ensure we continue to be recognised as a unique restaurant and bar offering within London and overseas.”
The appointment follows Tim Smith’s departure from his role as GM at City Social, which he had held for nearly three years.
Hastings added: “I look forward to working with Jason Atherton and culinary director, Dan Birk alongside the talented creatives at the wider company, to lead City Social into the next chapter.
“I am excited to continue the great work with the front of house and kitchen teams to bring City Social to even greater heights.”