Generally speaking all rates are negotiable, depending on location and requirements, and the need to charge a 'going rate' in each sector. However there are some basics to give you an idea.

Piano lessons at my home :-
are £12 for 30 minutes for children
and £15 for adults for 40 minutes.

Times, especially for young children, are generally limited by attention span, the need to concentrate, and capacity for information absorption !

Singalongs at old folks homes vary from £60 per hour depending on location.

A church organ session at a funeral is possibly £60 or £70 but depends on the norm used by the organising funeral parlour.
Incidentally, for church services in a small chapel without an organ the electric keyboard reproduces an authentic church organ sound.

I would be very pleased to quote for wedding services, background music at receptions or any other event.

I have a wide knowledge of music and a large musical repertoire acquired over the years. I can use a piano if available at the venue and my portable keyboard, which is very high quality (with audio equipment), is available at no extra cost.