Guild Wars 2

First of all how about using Asura portals to connect to the guild halls? Represent guild – walk through – Your in that guilds hall!

Secondly, how about customizable halls? People can donate dyes and resources to customise it, use cloth ect to make drapes, colour them with dyes, trim windows with gold and silver, bronze statues, pay money to relocate to another “home city” (mainly an environmental change), hire weapon-smiths and people to man crafting stations, visible banks and cellars, trade wall for in guild trades. Maybe even rooms for officers and the guild master!

Thirdly, as the title suggests, Guild hall wars, large sPvP maps where the entrances are replaced with the corresponding guild halls and the winning team is the one that destroys the opposing hall (or the most damage in a set amount of time) were both guilds put up a wager of influence points, winner take all and loser has to repair and start again. Upgrades as-well like in WvWvW, like guards, cannons ect.