I'm pretty sure many guys like this (no apparent provider ads, but extensive social media/gay club appearances, etc.) will meet privately with very discreet, trusted, vetted clients......word-of-mouth referrals through club promoters and similar might grease the wheels for a meet......clients who never post RM reviews or daddysreviews!!
if one really wants to meet him (or any of these 'no-ad' guys who appear at dance clubs) privately, I think the best advice is to directly go to the club/event in person, chat your intended up in a very respectful/non-creepy/polite way, do a couple lapdances (be polite!), and then simply ask if he is comfortable with safe private meets with clients (do not mention words like "escort", etc.).....