So is it ok to sexually proposition people in public - no.
This would be unusual or weird behaviour, that some would find alarming, creepy, menacing or predatory.
You don't know the background of the people you are projecting your sexual desires upon. They have not consented and you are treating them as a means to your own ends. It's immature, selfish and is sexual objectification - It's simply not acceptable behaviour.
I think it would concern or upset for some of the people, resulting in you being reported to your institution and possibly the police.