Offers and Promotions Siam Kitchen Christmas 2026: Set Lunch $15.90++, Communal Menus from $28.90++ and Festive Takeaway Feasts, Until 7 Jan 2027 Siam Kitchen's Christmas menus run from 1 Nov 2026 to 7 Jan 2027: a weekday set lunch at $15.90++, communal dine-in menus from $28.90++ per person, and takeaway feasts for 10 or more. Nov 13, 2026