How do I coordinate social, email, and WhatsApp?

Social posts give the notice, WhatsApp closes the table or the appointment, and email stays for someone who already asked for the menu or an event. Sending the same offer on all three the same day reads as noise. Give each channel one job: the notice, the close, and the follow-up for someone who already wrote. The email repeats the midday story, and the neighbour stops opening all three. You leave with a weekly split: what goes on social, what is answered on WhatsApp, and which email is kept for the event.