Originally Posted by das_ubersoldat

In Europe (from https://www.avis.co.uk/your-avis/avis-loyalty)

Avis President's Club

Members who spend €2,000 on 10 or more rentals a year qualify for our premier tier – Avis President’s Club. In addition to Avis Preferred and Preferred Plus membership benefits, President’s Club includes the following exclusive benefits:

• Priority service
• Priority for availability
• Single upgrade guaranteed***

• Weekend voucher* – received once per membership after completion of third rental.
• Free additional driver
• Double upgrade upon availability on weekends**

* Fuel, extra services and airport surcharges are not included.
** Subject to availability. Not eligible for vans, luxury, Select Series and Prestige cars, and rentals longer than 14 days.
*** Guaranteed upgrade at airport and railway stations. At downtown locations upon availability. Not eligible for vans, luxury, Select Series and Prestige cars, and rentals longer than 14 days.