A city/island inhabited by former adventurers. There are both trainers and mentors, and people who wish to be left alone.
You have to gain a lot of fame and renown in order to retire here, but they are willing to let obvious adventurers dock and visit for a while.
There are several class related guilds. The rogues guild keeps an eye on the city and the surrounding area, ensuring Sorpigal is not the continuous target of thieves and opportunists.