What a great idea Lorraine! Entertainment of this type can provide such a positive event for people with dementia, who will really respond to this wonderful stimulating experience.
You have many options when selecting entertainment and I think contacting your local council may be a good starting point as they will have a register of local groups who may be interested in performing at your facility.
You may also consider contacting local schools, both primary and secondary, who often have a creative production in progress. Recently, many Melbourne schools participated in Wakakirri,(
www.wakakirri.com) a story-telling event involving costume and song which may be ideal for your concert. The benefits of having young people visit your facility to perform can also provide many benefits
A community choir could be an ideal choice and you can find a multitude of these in the Melbourne metro area on the website
www.vicnet.net.au/choirs.
Finally,you may like to consider giving residents the option to perform if they are willing and able. This provides a beautiful opportunity to boost their self-esteem. Good luck Lorraine, I would love to hear how your event goes so be sure to share your experiences with others here on the forum!