Under the BYOW (Bring Your Own Wine) endorsement, can a customer open their own bottle of wine? October 07, 2021 01:59 Updated NO. Only a Smart Serve Certified staff of the establishment can open and serve alcohol in a licensed establishment. Related articles Can I be held liable for accepting a fake I.D.? When is it okay to ask customers if they are driving when they have been drinking? Can I accept an expired driver’s license as a proof of legal drinking age? Does Smart Serve expire? Can patrons walk around a restaurant with their drinks?