It's been so long since I used the post office that I've forgotten how pathetic they are.
I foolishly sent a document via Speed Services Counter-To-Counter Overnight recently - well, 8 days later they supposedly sent out the first notification for collection AT THE WRONG POST OFFICE!
Definitely YES, with the restaurant taking some responsibility to ensure that guests don't overindulge or drive drunk, making sure the designated driver remains sober and possibly provide or arrange a drop-off service.