The evening also involved visits to the agency's other central London venues including Grace and the Piccadilly Institute.
Guests sampled cocktails such as Christmas Kiss, and tried the festive canapé and bowl food menu, including a Thai green curry with coconut rice and a trio of spiced and sweet desserts.
Emma Howe, head of corporate at LNL, said: "Late Night London's agency bookings have grown in value from £300k to £2m over the last three years.
"Agencies work as an extended part of our team, in many cases as brand ambassadors, consistently driving bookings into our venues and showcasing to them our Christmas options is vital to our continued growth."
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