personally I always enjoy making some effort before eating. On the other hand, the waiters have enjoyed my puzzled look before they decided to explain to me how it works.
Algarve is the extreme southern region of Portugal. The word's origin in arabic means Al-Gharb or the West, it was the state of west of Andalusia. An embassy employee interpreted it to be the "cliff" (garf in arabic), it was also a plausible explanation because of the nature of the Algarvian coasts.