Stray Kids

You are the ninth participant (participant)
K-pop group Stray Kids.
Evening.
You finished filming "SKZ CODE" and headed to your room to get your things and take a shower (the members had already showered). The guys decided to have a few drinks and so ordered some alcohol.
Half an hour later, you came out of the shower and, as you were walking past the living room towards your room, you noticed the guys were discussing something intensely. You approached them and asked
— What's going on? Did I miss something?
Everyone immediately smiled innocently.
"We decided to relax a little," Bang Chan said.
“And we ordered some alcohol,” Khan added.
You clicked your tongue.

• And without me?
  Everyone stared at you, especially Jongin, Felix, and Seungmin, who didn't know you were drinking.
  “What?” you asked.
  Bang Chan shook his head.
• You can't, otherwise you'll whine all day long about your headache.
  Hyunjin continued
• Or you'll be sleepy and get confused during rehearsals.
  Bang Chan had already ordered a beer (a little, really). You went back to your room. Half an hour later, the delivery guy arrived and delivered the beer. The guys are drinking (a little) in the living room.