Regarding the commoners - specifically mapped for the Midsummer Holiday

• in pairs, centred on middle of pair

NOTE:
I can find no sign of a Tauren Commoner in Silvermoon

Human Commoner 18927
Stormwind
54.30,64.34
61.53,62.35

Dwarf Commoner 19148
Ironforge
30.91,63.05

Gnome Commoner 19172
Ironforge
58.04,49.52

Night Elf Commoner 19173
Darnassus
41.51,44.78

Draenei Commoner 19171

Azuremyst Isle
    20.46,54.38
The Exodar
68.06,61.83
60.89,28.51
51.93,42.72
60.15,48.96

Orc Commoner 19175
Orgrimmar
51.45,69.42

Troll Commoner 19177
Orgrimmar
46.65,62.22

Forsaken Commoner 19178
Undercity
63.18,47.47
67.71,39.16

Tauren Commoner 19176
Thunder Bluff
41.84,55.67

Blood Elf Commoner 19169
Silvermoon City
78.01,57.63
90.17,57.50
89.61,49.15
Eversong Woods
54.18,50.77

Goblin Commoner 20102
The Barrens (Ratchet)
63.03,37.15
Stranglethorn Vale (Booty By)
26.82,76.90
27.54,77.61
26.85,73.91
Winterspring (Everlook)
62.38,36.80
60.37,36.41
61.27,37.55
61.38,38.59
Tanaris (Gadgetzan)
50.94,29.23
52.05,28.45
52.34,27.63
51.59,25.63

Shattrath City
    63.60,39.74   by Flight Point
    54.95,38.49   by Old Alliance Capital Portals
    58.03,46.13   by New Capital Portals
    53.04,51.09   by Old Horde Capital Portals
    49.16,31.48   by Aldor Tier base
    28.17,47.04   by Aldor Tier Inn
    58.92,58.09   by Scryer Tier base
    55.22,80.53   by Scryer Tier Inn