The Alexandra's offer is not the only initiative aimed at making sure no one's on their own on Christmas Day. The hashtag #joinin, publicised by the comedian Sarah Millican, aims to connect people who might otherwise be alone over the holidays so they can chat on social media.
Some posters have been using the hashtag to offer places at their own Christmas meals while others are suggesting gift exchanges.
"Anyone on their own want to do a gift exchange? I love buying gifts for people," posted Twitter user Kayleigh.
