G Adventures 18-to-30 somethings - Is it just a party or are they on the chill side?

I am 25 and love being social, but I get burnt out very fast after about 8pm. I'm not socially awkward, but I'm on the spectrum, so it's much more work. Are the 18-to-30 somethings trips by gadventures super rowdy and stay up late types? Or are they fairly casual and low key? I don't want to feel socially uncomfortable and disconnected while I'm there.

I am looking at the Peru ones, and I did an "active" Costa Rica trip last year with a wide age spread from 18 to 70. I quite enjoyed that, but the itinerary for the one I want isn't listed under the "active" type that allows for more seasoned folks.

Thanks!