[Searched and there doesn't seem to have been a tipping thread in a few years.]

I recently posted a bit about my experience at the George V which was marvelous. I am curious how my practices compare with others.

If you contacted the concierge prior to your arrival with requests (e.g. restaurant reservations), do you tip on arrival? In that case, might you also tip on departure?

If there is a large concierge staff, do you tip the ones who helped you or the head concierge? Are the tips pooled, by the way?