At both the Singapore Marriott and the BKK JW lounge staff have taken my photo to be placed in an album in the back room so that staff (esp new staff) can recognize frequent guests (the regulars) and address them by name, as well as preferences noted. At the BKK JW the lounge provides personalized coffee/tea mugs for frequent guests. Staff knows that I prefer black coffee and in the evening my favorite cocktail is provided w/o asking. Several times the lounge manager mentioned that she knew I was coming since they check the elite list daily. This is only my experience from these two properties, and I expect that mileage varies--but at least some props pay close attention to elites.