In Warhammer Online, Taverns are one of the in-game places to learn a secret or two.  Another great thing about Taverns is that they are often stuffed with merchants and other services for you and your guild.  See what else they have to offer!:

Powerful guilds from all over the world come to Altdorf and The Inevitable City to gather and trade their secrets in our Guild Taverns. Will you answer the call and join them? Only the most prestigious guilds are able to enter these special areas, where guilds enjoy a variety of benefits available only to them! Wouldn't it be great to have a place to network and ally with like-minded guilds to plan and carouse until the wee hours of the morning? We thought so too, and it's for that reason that we bring you Guild Taverns!

WAR Herald has a lot more about Taverns in this Guild Highlights article!