I voted for Captain's Quarters, guilds can meet other places too. PIC's Meeting place. (And PNC's) Is a secret pool in Cuba. (Not saying where it is
).
Also, who said that Guild's coulden't meet in their GM's Captains Quarters, Officer's etc. I agree with Zep I don't want to get a 1,000 Gold Picture of a War Frigate only it to be replaced by Del's leftover rum (xD).