What it looks like in a UK hospitality business
Set it against what you would have made on a comparable bottle from your own list, not as a token amount, or every table with a wine buff becomes a table with no wet margin. Plenty of operators run corkage deliberately on quiet nights or for private parties, which is a reasonable trade when the covers would not otherwise exist. Remember the licensing position too: selling alcohol requires a premises licence, and alcohol brought in and consumed on site sits under different conditions that your licence may or may not permit.
