Are you all under 18? I ask this because, if there are no adults in your group you will not be allowed to check-in to an hotel. You most certainly will not be drinking or visiting CoffeeShops and, while you can visit the Red Light District, you cannot have sex with the girls there - you need to be 18 for all these activities and will need to show your passport as ID.
As you will be a tourist in the Netherlands, the local girls are not going to be interested in you. You will also be in tourist areas, and most girls you age will be in the suburbs - with their families, doing their homework, socialising with their friends etc!
And you do realise that the Hague is not in Amsterdam but 60 kms away!
So what you're doing is going to Hague, which is a city known only for the tribunal court of justice, and looking for girls who are dtf? Cool. Good luck.
Most girls will not dive into a bed with a stranger.
Most do not even dive into a bed with someone they know well.
As a foreign guy who is desperate for sex you will not have much of a chance to get laid.
You are aware that the minimum age for drinking is 18 now, also for beer and wine?
I guess that as a group of 16 year old guys you will not be happy in the Hague.
Most bars and cafes check for age these days and night clubs will not let you in at all.
if you're a child and not paying them, I doubt it.
Probably not. Would depend on your charm
Some might be, you never know your luck.