How much should I bribe a Maitre d at a high scale restaraunt when there are no reservations available?

We want to eat at a high scale local steak house Saturday night, but there are no reservations available. Average tab for two people, about $150ish. Spoke to a hostess today to set up a reservation who suggested the Maitre d could be “persuaded” to help me out if I showed up. How much should I try to give this guy?