Members of the gym include those recovering from accidents, strokes, heart attacks, surgery or more permanent situations such as motor neurone disease, multiple sclerosis or Down syndrome.
SwitchedOn's exercise physiologists are university qualified and are able to create individual programmes. On hand is advice on health, mobility and wellness.
The centre also offers massage, nutrition and gentle yoga classes and training programmes.
Ms Cotton said money raised at the auction would go, via the SILC Charitable Trust, to buy equipment for the gym.
The auction will be held at Nosh, 35 Macdonald St, on Wednesday November 16, starting at 6.30pm. Tickets are $35 including drinks and canapes, and are available at Nosh, SwitchedOn and SILC Charitable Trust.
ENDZ