Emma Bunton, Geri Halliwell, Mel B and Mel C joined Jennifer Saunders, writer of their recently-launched Viva Forever! musical, to sample five champagne cocktails inspired by the girls themselves at the London department store's fifth floor bar.
Each drink has been created as a tribute to the girls' popstar personas, with the 'Baby Spice' cocktail made up of peach and strawberries, the 'Ginger Spice' drink containing Domaine de canton ginger liqueur, the 'Scary Spice' featuring a hint of fresh chilli, and the 'Posh Spice' appropriately containing 'grapefruit bitters'.
Each comes tied with individual bows ranging from a Union Jack - a nod to Halliwell's famous dress - to Mel B-style leopard print.
The cocktails are priced at £14.50 and are available until the end of April along with the 'Viva Forever!' afternoon tea menu.
Viva Forever! writer Jennifer Saunders and producer Judy Craymer with the Spice Girls
For the rest of this month, Spice Girls fans can sample either for £30, or purchase a £75 package that includes a ticket to the Viva Forever! musical.
Beckham sparked speculation of a fall-out with the rest of the band when she arrived to the December premiere of the show late, forcing her four former bandmates to hit the red carpet without her.
Subsequent rumours claimed that a planned Spice Girls reunion had been axed as the fashion designer is "no longer talking" to Halliwell.
Viva Forever! is reported to be facing the axe due to poor ticket sales and terrible reviews.