Speaking as someone whose Dad has been in a Nursing home for 10 months - our experience is that they have a super duper activity programme - but that it is of quite narrow interests and really only beneficial to those who can willingly engage. For example a few of the residents can read and manage pencils so can ddo colouring/arty activities. Some enjoy the musical activities, some are able to dance, some can enjoy walking round the gardens and simple cooking activities. There is a weekly coffee morning with a sing along, and numerous multi faith services run by a wonderful chaplain, weekly bingo, a hair/beauty salon etc etc.
BUT.. the flipside is - most can't read and don't have the motor skills to manage pencils. Many cannot tolerate the noise of the musical and singing activities and become extremely agitated and/or distressed. Most cannot focus on tasks without 1:1 support and many, I hate to say, possibly feel patronised by the dumbing down of some of the activities.
Because let's face it, despite in this case all the residents having varying degrees of dementia illness, many of them are fundamentally as they were - somewhere inside - and what works for one, won't work for others.
When I visit, and certainly at weekends, they are often all dozing or staring onto space, or wandering around apparently oblivious or confused.
The residents who want/are able to take part can do so. The ones who need more, or differentiated , activities, are a little neglected. There are just never enough staff to provide activities tailored to so many abilities, likes and tolerances. Obviously the carers are more often than not busy with physical tasks, or managing behaviours and the care of residents is superb, and they really do try.
Where my Dad is, the budget for 'activities' is only £140 per month, for 48 residents!
So we have a resident's fund, whereby any monies raised can help towards extra treats - like animals coming in; 1940's singers; we had a lottery funded 20 weekly sessions of fun activities run by a team of young students with additional needs (and the rapport between the young SN people and the dementia residents was just beautiful ) and so on. Some local companies will occasionally offer something at no charge/reduced charge, like surplus flowers to allow flower arranging.
I think most homes rely on volunteers to help with fundraising/ideas/activities too