A Galaxy class has room for LOTS of everything.
Plenty of space for every kind of lounge and conference rooms and meeting halls and formal reception areas and you name it.
And yet most everything we saw, from informal casual gatherings to high-level ambassadorial functions to theatrical performances to crew ceremonies to music recitals ended up in Ten Forward. I guess it was everyone's favorite spot but, come on. It's not a tight ship where rooms need to be multi-purpose.