There are a number of Coworking spaces / Business Centers in Hong Kong providing hourly/daily/monthly desk rental.

Community
Coworking Hong Kong is an open community that organizes in a Facebook group. Coworking places from all over Hong Kong list their current offerings there.

By Locations:

Hong Kong Island

• arco city  (Wan Chai)
• Wynd (Central)
• Campfire (Kennedy Town / Wong Chuk Hang)
• theDesk (Sai Wan) 
• Garage Society (Central)  
• BootHK (Sheung Wan)
• The Crafties (Sheung Wan)
• The Hive (Wanchai)
• PLATFORM (Sai Ying Pun)
• UNO coworking space (Central / Sheung Wan)
• Puerta del Sol (Chai Wan)
• 4Cats Co-business Community (Quarry Bay/Tai Koo)
• Sky Business Centre (Causeway Bay)
• Urban Serviced Offices (Central) 
• Compass Offices - Central Building (Central) 
• Compass Offices  - Infinitus Plaza (Sheung Wan) 
• Compass Offices - The Lee Gardens (Causeway Bay) 
• Compass Offices - Langham Place (Mongkok) 

Kowloon

• Desk in TST (Tsim Sha Tsui)
• The Good Lab (West Kowloon)
• Sky Business Centre (Tsim Sha Tsui) 

New Territories

• Idea Factory Coworking Space (Tuen Mun)