Adelaide Town Hall’s Green Room is a compact, adaptable venue at 128 King William Street, suitable for meetings, breakout sessions, small catered celebrations and cocktail receptions. The operator publishes a floor area of 53 square metres and alternative capacities including 50 cocktail, 40 theatre, 30 banquet, 16 boardroom and 18 U-shape. Its heritage setting can be paired with the adjoining Upper Southern Gallery for event flow, subject to a separate hire arrangement. The town hall offers coordinated catering and audiovisual support through its event suppliers. Capacity figures are configuration-specific and should never be combined.