In the last 2 decades, these observations are probably spot on (regrettably, IMO).
In the 70s to 90s, absolutely not. My most memorable pick-up was in Tang's department store in the Mens' underwear/swimware section. He did the picking up and we several very good hours of hot fun. He couldn't stay any longer as he was in rush to get to the airport because he was flying to Perth to start his Uni education.
I put this change in attitudes down to greater 'westernisation' of Sing and the attitudes engendered by Higher Education putting Uni-educated Singaporeans 'above' most other peoples.