Head to City Wok, where you will find two elf kids near the front of the store. You can attack them and easily defeat them for some quick experience. Then enter City Walk and save your progress before exiting to find that the elf kids have returned. You can repeat the process as often as you like, easily obtaining experience and loot. Make sure that you pick up any goodies they drop, though, since the kids may not materialize if you've left a bunch of stuff lying around.