I work in a nursing home and I can assure you the residents are given a choice. Yes there is entertainment usually more variety style acts so it's visual performances backing up the music, we also have one to one or small groups so residents can listen to exactly what they want. Lively and lovely music well presented raises residents spirits and can change their day, even if Vera lynn creeps in sometimes. The war years and just after produced some incredibly moving stuff and this is often where their memory is sharpest . Mixed up with modern stuff brings out the best in the residents and makes them smile, music for dementia has to be selected carefully as their moods can change at different times of day, suitable music to enliven or calm as necessary helps everyone. I'm from the black sabbath and led zep camp myself but if we played that I think there would be a riot! Cater to individuals is key.
To think that London, or anywhere else for that matter, does not belong to any one demographic