Former swinger in Montreal?

• Show full of new gizmos
• Product showcase
• Any large exhibition
• Trade show, for short
• Giant fair
• Gadgetry showcase, maybe
• What a Washington National was called before moving from Montreal
• World's Fair, e.g
• Comic-Con, e.g

Wiktionary Word definitions in Wiktionary
n. 1 An exposition. 2 An expediter; a restaurant worker who prepares food to be taken to tables.