Great idea.

When eating raw oysters in a restaurant, always sit at the oyster bar. Oysters are shucked ahead of time for the tables in most places. (Also, you may be given a few freebies if you strike a conversation with the shucker)

If you are sitting at the bar and are drinking beer, drink draft. On many occasions, even first visits, I have seem to haved paid for less beer than I have consumed.

Hopefully this is what you meant.