Service Clinics

Greetings all-Just searching for new ideas on service clinics-not to be confused with new car clinics.
I usally do 2 service clinics per year on a Saturday from 8-2pm. I offer a free inspection and usally give away a small inexpensive gift to encourge customers to show up for their appointment. The turn out is somewhere around 75-100 vehicles.
So if you have done anything similar with success I would be intrested in hearing your ideas and suggestions.
Thanks
I usally do 2 service clinics per year on a Saturday from 8-2pm. I offer a free inspection and usally give away a small inexpensive gift to encourge customers to show up for their appointment. The turn out is somewhere around 75-100 vehicles.
So if you have done anything similar with success I would be intrested in hearing your ideas and suggestions.
Thanks