The Dinner.

Because he lost a bet, Bob had to treat Harry to dinner at a very posh restaurant.
The maitre d' ushered them to a table on which was displayed the finest china and crystal.
Taking the damask napkin from the solid silver napkin ring, Harry unfolded it, put it around his neck and proceeded to tie a knot at the back.
Staring at Harry, the maitre d' said between gritted teeth, "Sir, will you be having a shave or a haircut?"