So our venue offers complimentary valet parking for our guests. I am wondering what to do about tips for this? Is it us who will give the tip, or the guests who utilize the service? Of course we don't want our guests to have to pay, but I am wondering if they are going to anyway? (I'm trying to think like, if I were a guest at a wedding and my car was valeted, I would probably give them a couple dollars without thinking twice about it.) We are happy to handle all the gratuity so our guests don't have to, but I don't want to be giving them double if our guests are going to end up tipping anyway.
I am also not sure how much to leave for gratuity for this. I know usually valet gratuity is done on a per-car basis, but I have no idea how many cars will be using the service, nor am I likely to find out.
Any suggestions on how much to set aside for them?