The sportsman was, 45, suited and booted for the night out alongside a dapper looking David Walliams, 49, and comedian Jack Whitehall, 32.
Oswald’s is a member’s club for both men and women, which has a huge focus on wine and the group were pictured leaving around 11.30pm.
Once inside, Dave shared a picture of the men sitting around a table, drinking tea and eating grapes on Instagram.
He also posted a gallery of birthday messages he had received from his celebrity friends.
Joined by CJ Jones, Damian Mould and Philip Rebeiz, the men obeyed the rule of six as they caught up with one another, with Walliams seated on another table.
Surprise birthday dinner: Gardner, (right) shared this ‘rule of six’ snapshot from the table, sitting with (L-R) Damian Mould, Philip Rebeiz, CJ Jones, Jack and David.
What a comic: Jack posted a picture of himself and Dave holding candles to improve their lighting on Stories
Also seen leaving the restaurant was businessman Nick Candy, married to actress Holly, (formerly Valance.)
Beckham looked as though he had stepped straight out of the pages of a fashion magazine as he left the venue wearing a sharp blue suit worn over a lighter shirt.