- Chauncey wears one. Loot his corpse after his assassination in Beyond the Beef for a set of formal wear.
- Mortimer wears one; you will need to reverse pickpocket him or kill him in Beyond the Beef to get it.
- Can be found in the Ultra-Luxe casino on certain non-player characters.
- Marjorie will give a set to you during the Beyond the Beef quest.
- The White Glove Society members in the kitchen cooking brahmin with flamers both wear a set of Formal wear.
- Adding this to Veronica's inventory will earn the player her thanks and a special unarmed move, Scribe Counter.