Upstairs cafs in Hong Kong are usually tiny, unadvertised businesses, but sometimes customers tend to reserve the whole outlets for parties and gatherings because of the low prices compared to other restaurants at street level.
Customers of upstairs cafes sometimes reserve the whole outlet for parties and gatherings because the price of reservation is not as expensive as that of the restaurants at street level. Upstairs cafes are typically small businesses. These cafes are usually tiny, unadvertised, and located in unmarked buildings in Hong Kong. 
