Originally Posted by
luziczek
You can also try searching on TripAdvisor in replies for the reviews. I've found a publicly posted email address to Guest Relations Manager of one of the hotels I was staying using this trick
This is the most reliable solution I have found. Since TA is one-sided, properties seeking responses have to post contact info.
In cases where they don't post contact info, the TA responses will often have an employee name attached to them. It is known that Hilton email addresses have the construction "Firstname" DOT "Lastname" AT Hilton DOT com (no spaces anywhere, and symbols of course). This is not a failproof method but has been known to work.
A phone call is usually the most surefire way. Use skype if it's international.