Don't be so quick to dismiss. There are lots of great community fundraisers in San Francisco that feature drag queens. Sure, the audiences will be, on balance, more queer people than average, but these events are still lots of fun for any human being.
I lived in the second gayest city in America for a good while and I wasn’t walking in on gay orgies. I don’t recall a single instance of gay public affection despite being outside often, but I also don’t recall any straight instances either because I don’t care about it. I have good success finding desirable partners and don’t hold feelings of jealousy or anything so any instances of PDA leave my mind because I don’t care about them.
It seems like either a personal problem, or a problem with lawlessness in general. Would you be happier walking in on straight orgies? Is that legal in Singapore? Seems wild that they’d allow that, but your post implies it.