The club was set up recently for Royal staff and guests and has already shown Star Wars at the castle – but to have a live band and big screen film was a first.
Her favourite song is said to be Dancing Queen – so when Her Majesty allowed 500 staff and guests to dance the night away at Windsor Castle, it’s no surprise the music was provided by an Abba tribute band.
And when it got dark, the blockbuster film Mamma Mia!
'It meant lots of ordinary people from Windsor could come in for the night.‘Everybody was very well behaved, and once you were inside you were encouraged to really let your hair down and dance and sing.
'It was a fabulous night, thanks to the Queen.’ Staff had to put the names of those who were coming on a list to be checked in by security. A Royal source said: ‘There are staff events for those who work here.
which features Abba’s hits, blasted out from a giant screen.