Blessedly, most of those in Singapore are hardier than you and survive in grown-ups clothes in the city proper. Things might get looser at the weekend and on the coast, but ....

Noone's going to stone you for inelegance. Jakartans are generally tolerant of the ways of foreigners. OK, broad exceptions to that, but fashion faux pas are excused.

And i would defend your right to dress in any way you wish: shorts and all . But you did ask.

The caveat is that it takes a level of insouciance, and wise choices to carry it off. And from your questions, you might be a little short in one or the other of those areas.

Arizona golf course or Fort Lauderdale chic is not a look that travels well.