Originally Posted by
kevincrumbs
Would a restaurant in a hotel be your best bet? I would think that they have more experience dealing with large groups and obviously have more experience dealing with English speakers. Since you mention that there's no one in HK to help you with this process, I would think that emailing with the hotel in the run up to the dinner would be a possibility, allowing you to setup the dinner up from afar.
OP has mentioned budget of $30USpp which is about 225HKD
Maybe the YMCA TST Buffet?