Whether it's for a one-off celebration or regular revelry, always invest in a top-quality tuxedo. Traditionalists prefer slim, single-breasted versions, while the fashion-conscious choose to step out in morning coats, mandarin collars, retro playboy prints ... or bypass the jacket altogether.

Lightweight wool tuxedo ($13,150) by Helmut Lang from Lane Crawford, Pacific Place, Admiralty. Cotton shirt ($3,600) by Balenciaga from Joyce, Pacific Place. Shoes ($3,200) from Gucci, The Landmark, Central.

Tuxedo shirt ($3,750), trousers ($18,000, with jacket) and bow tie from Louis Vuitton. Platinum and sapphire shirt studs ($123,500), matching cuff links ($84,000) and gold ring ($23,800) from Buccellati, The Landmark.