I think it is also different as well because of the climate. HK but definitely a city like Bangkok are a lot warmer and the warmth is more 24/7. In south of Spain or PT it is still warm and you can sit on the terras during the day now, but once the sun leaves it gets quite uncomfortably cold. Bangkok does not have that, so night is actually nice and comfortable to walk around it, shop, get streetfood etc.
Another difference is regulations and hygiene. In Cambodia and Thailand, even in villages you can get up 3 am and wake up someone in a stall (of which there are 20+ in a row, so you can pick) (sleeping in a hammock) to cook you food, get you a beer etc; you cannot do that in the EU.