Great place to wash and vacuum your vehicle, located opposite St Lukes shopping centre (Westfield). Washing and vacuum machines are coin operated and time based. You should be able to wash and treat your car for about $4 - $6 depending on your speed. Allow another $2 - $4 to do an indoor car vacuum. Cheaper than using auto-washing machines, and potentially a better job depending on your elbow grease and effort.
A fun activity with friends - and you'll get more done in the timeframes - saving dollars.