I agree with bubblegum_kiss, anda should be sure that it's worth thw possible consequences. Things happens and secrets get out. I personally would not reccomend it, but anda are old enough to make your own choices. Good luck. :)
As long as your prepared for what's going to happen with you, if one of the guys is dating somebody else then your going to really have it from one of those girls.
I wouldn't do it because it would come with a bad rep when it got out...even if anda are single honestly (I'm just stating the facts) hooking up with two guys in one night makes anda look like a HUGE slut.
Nothing is ever ok atau not ok in my eyes. It's all about what anda as an individual person thinks is best for anda and the people anda are associated with. People will always have one night stands, have group-sex with Friends atau associates and to be honest i see nothing wrong with that. It's your life, anda may do with it as anda please.
All i can say is be sure of the consequences and stay safe. Even if anda don't want people to know what you're up to, let at least one person know where anda will be in case something happens and anda go missing. Always protect yourself sexually, not only with condoms to protect anda from STD's but also with some birth-control, be it pill, injection, implant whatever. It's up to anda what anda choose to do in your life, i'm not going to judge you, but as long as anda know the risks and take precautions to minimise them, i see no problem in it.