Locate the Dwarf, Gimit Delerg. He can be found in North Freeport in The Jade Tigers Den at ( -110, -21, -82 ) /waypoint -110, -21, -82
Hail him until he challenges you to a fight outside after he finishes his drink.
Locate Gimit in one of several randomized locations outside.
Knock some sense into Gimit.
When you leave to fight him, he may be in one of several places in North Freeport. It should be marked by a blue dot on your map indicating an area of interest. If the map marking fails due to a bug, hail Gimit again and he will give you an approximate location based on landmarks.
Some known fight locations include:
In the street between the Temple of War and the T2 guild hall at ( -48, -12, -185 ) /waypoint -48.47, -11.96, -185.20
By the entrance to Thieves Way near the T2 guild hall at ( 4, -20, -217 ) /waypoint 3.83, -20.07, -216.54
Between 5 and 7 Compassion Road in North Freeport at ( -191, -59, -171 ) /waypoint -190.93, -58.80, -171.47
Near the wall on the south side of the Academy of Arcane Science at ( 25, -8, -87 ) /waypoint 25.10, -8.07, -86.70
Near the gate to Beggar's Court at ( -120, -53, -328 ) /waypoint -119.83, -53.12, -327.63