Make the job less stressful and more money
Massage limits for therapist. Increase pay for ALL staff.
Look after your staff
Treat your staff better, employ the correct amount of staff for the clubs size, actually enforce health and safety to stop more people being killed.
Consider staff more
Pay more than minimum wage for a start.
Just listen to the gym team and have an area manager sit in.
No idea why there is a need for an area manager - it took a month of sundays to order a 'barbell' not the real example - it was another small piece of kit) which involved a gym team staff member, line manager, gym manager, area manager, and some head office staff no doubt. :)
Educate members prior to joining about what this gym brand expects of them - behaviour, cleanliness, etc.
Keep doing what you are doing - the recent changes in staff training are outstanding, and i love the fact that we pay the over 25 rate from 21 years upwards. The only thing I'd perhaps look at are the member attendance figures on bank holiday weekends, and the possibility of adjusting the opening hours slightly if it is consistently quiet.
In all honesty no one really ever wants to leave.