How do you fit email into the plan?
Email goes to people who already know you and repeats the offer that is on the door that week, not a second one. A list is not opened if you do not have addresses of real guests.
Write to us. A quote with no commitment.

Count how many addresses belong to people who have come, and delete the rest. A different promotion from the ad is sent and the table does not know which one applies. A short text, the same line as the ad, and the date it is sent and then stopped.