A Tea for Every Occasion

According to other comments, they should be at the following locations and you should have access to 4 per day:

/way 26,7, 14,6 Simone
/way 27,3, 20,1 Vulca
/way 31,7, 14,2 Laurent
/way 24,8, 17,5 The Countess
/way 27,1, 18,5 Kael'thas Sunstrider
/way 26,6, 20,1 Archivist Fane
/way 31,4, 20,4 Lost Sybille
/way 32.8, 14.8 Iven

For Tea for the Troubled, you'll need to serve tea to 8 specific people as part of the 15 allies total. You will not be able to see them until you transform into the "vehicle" that is [npc=178181] (29.6, 17.6). These named characters are not up at the same time, so you'll probably need to look for them over multiple days. You can re-enter the Tubbins vehicle by talking to him again. Don't hand in the quest until you've finished, or you won't be able to get the achievement.

Location descriptions with coordinates:

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• [npc=179465] is to the north-west, standing near Prince Renathal and his quest turn-in point (26.7, 14.8)
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• [npc=179477] is to the south-west, near Malevolent Stygia. She's under the bridge to Calcis, standing against a pillar on the ground floor. Look for the red candles on a rock pile (27.3, 20.1)
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• [npc=179466] is to the north-east on the ground floor, between the Portal to Torghast platform and the wall (31.6, 14.2)
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• [npc=179473] is to the west, to the left of Reldorn and the Chaotic Riftstone to the Crucible (24.8, 17.5)
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• [npc=179475] is to the south-west, near Malevolent Stygia. He's standing under the bridge, to the right of the stairs. (27.1, 18.5)
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• [npc=179471] is to the north-west, up the stairs on the bridge to Calcis (26.6, 20.1)
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• [npc=179476] is to the south-east, by Drifting Sorrow (31.4, 20.5)
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• [npc=179478] is to the north-east, outside the wall. If you run up the tall outcropping of stone, Iven and Zena can be found dancing together at the top (32.7, 14.8)
• 
  

Use these TomTom map coordinates before entering the Tubbins vehicle:

/way 26.7, 14.6 Simone
/way 27.3, 20.1 Vulca
/way 31.7, 14.2 Laurent
/way 31.4, 20.4 Lost Sybille
/way 26.6, 20.1 Archivist Fane
/way 24.8, 17.5 The Countess
/way 27.1, 18.5 Kael'thas Sunstrider
/way 32.8, 14.8 Iven

Good luck!

Yooooo... so there's a 20 minute "this person has tea already" type debuff that makes targets unable to contribute to the advancement of this quest. And it lasts 20 minutes... and it's... if I'm interpreting this right... COMPETITIVE WITH OTHER PLAYERS? Like I'm seeing NPCs with this debuff... and I didn't put it there.

This SO has to get fixed. Between this and "gold is no object," the competitive clickable factor just reeks in 9.1!

This had better get hotfixed!