Walk-in waitlist on the SevenRooms tablet. Add name, party size, phone number. Quoted wait should be conservative — if you say 30 min, beat it at 25. Text when the table is ready. If they don't respond in 5 min, mark as 'no answer,' move to next on list. Re-add to the bottom if they show up later. The bar is the primary holding zone — walk waitlisted guests to the bar for a drink.