Originally Posted by raph

Full List - Last Updated 17th of August 2010.

Australia
BNE - Smoking balcony in international terminal
CNS - Smoking room/balcony in international terminal

Austria
VIE - small smoking rooms in various locations

Bahrain
BAH - Smoking Room at Gate 12A

Belgium
BRU - recently opened (small) smoking room behind gate B17. Nothing so far in A concourse.

China
PEK - "Exceptionally clean smoking rooms"
PVG - "Exceptionally clean smoking rooms"
SHA - "Exceptionally clean smoking rooms"

Costa Rica
SJO - Smoking room downstairs near the food court
LIR - Smoking area between the two gate areas

Denmark
CPH - smoking cubicles in various locations (upstairs in the main hall), also in Servisair Lounge

Dominican Republic
LRM - A balcony/veranda outside the departure lounge.

Egypt
HRG - Dedicated Smoking areas at departures.
CAI - Smoking areas near Gates

Finland
HEL - Smoking Lounges in different parts of the airport. Smoking Area after baggage claim.

France
CDG - Terminal 2F

Germany
DUS - Terminal B opposite Gate 25, Terminal C opposite to Airberlin Lounge.
FRA - Terminal 2, various Smoking cubicles before Gates. Terminal 1 Schengen and Non-Schengen.
HAM - smoking cubicles in various locations. smoking rooms in the LH C/SEN/FTL lounges and the 3rd party contract lounge, smoking room upstairs at the A gates.
*MUC - Designated smoking zones in waiting areas and restaurants in Terminals 1 and 2
NUE: downstairs next to the entrance of the Noris-Sky-Lounge
TXL - enclosed smoking room in the BA lounge, Smoking Room in LH SEN Lounge

Greece
ATH - Swissport Lounge, Aegean Airlines Lounge

Hong Kong
HKG - Various smoking rooms throughout the terminals.

Hungary
BUD - Smoking room near Gate 12

Iceland
KEF - A smoking room near the duty free shop

India
MAA - Smoking Room on Domestic First Floor and International first floor.

Italy
FCO: T3 next to gate D5

Japan
NRT - Smoking rooms airside throughout the terminal, there are also smoking rooms inside both NH lounges by gate 40s and gate 50s.

Korea
ICN - Smoking rooms airside throughout the terminal.

Kuwait
KWI - Smoking Rooms

Kosovo
PRN - Smoking room next to Gate 1

Lebanon
BEY - Smoking Room(s)

Malta
MLA - outside balcony, also screened-off room inside Club lounge

Morocco
RAK - Smoking Area in T1

Netherlands
AMS - cubicles, smoking rooms in some bars and smoking rooms in the KLM lounges.

New Zealand
AKL - has an outdoor smoking area

Oman
MCT - Smoking Rooms on first floor, Smoking Room in Plaza Premium Lounge

Qatar
DOH - Various Smoking Rooms Airside, very bad ventilation.

Saudi Arabia
RUH - Smoking Room Airside, but people smoking near trashcans right outside the Gates also.

Serbia
BEG: at gate A5

Singapore
SIN - outside smoking areas in T1,T2 and T3, Smoking area in Silver Kris Business lounge T2.

Spain
BCN - Designated areas, T1 Spanair lounge has a smoking room
MAD - Various Smoking Areas throughout the terminals. Smoking Areas at baggage claim, T2 Spanair lounge has a smoking room

Switzerland
GVA - large smoking lounge upstairs across from the LX C lounge
ZRH - smoking lounges in both piers, ZRH SEN lounge bar allows smoking

Turkey
IST - "Heated outside cage"

Ukraine
KBP - Smoking area in the international departures area by the small duty free stores

United Arab Emirates
DXB - Smoking Areas spread out across Terminals

United Kingdom
BRS - Airside Outdoor Smoking Area
EMA - Has an outside smoking area
MAN - Terminal 1 - Upstairs behind food court, also an area at T2 (according to Website)

United States
*ABQ - One is located at the Route 66 Diner near the center of Concourse A & B; the other is located on Concourse B.
ATL - designated smoking areas at gates A14/A23; B9/B24; C19/C38; E8/E17/E28 (int'l terminal); and T3/T13
BNA - inside the cigar/tobacco store in Concourse C, across from food court, for "customers only."
CLT - In one of the US Airways Lounges
CVG - smoking area, behind the food corner
DEN - Aviators lounge, (Bar). Mesa Verde restaurant, concourse A; Aviators Lounge, concourse B; Smokin' Bear, concourse C
DFW - Airside smoking rooms inside ONLY inside AA Admirals Club at terminal A and terminal D.
*GPT - One smoking lounge in main terminal.
*GSO - Smoking pemitted in main terminal only. One Smoking bar upper level.
IAD - Smoking lounges are located near gates B38, C4 and D30.
MDT - Smoking lounge airside in the C gate area
*MKE - One smoking lounge on the upper level of the main terminal near the entrance to concourse E.
MIA - Outdoor smoking area near the American Eagle gates (D)
*OGG - Outdoor areas located within terminal.
*ORF - smoking lounge was located near the CO gates (Non-NonRev is not sure if it's still there)
RNO - has one..pinworm was surprised to see it.
*RDU - AJ's Tavern near A21, Carolina Varsity Bar & Grill near A16 (located in Terminal A) and Triangle Cyber Café and Pinehurst Village Brewery located in Terminal C.
*SDF - One smoking lounge on the mezzanine level of the main terminal
SLC - Smoking lounges are located on the lower levels of both Concourses A and B, and in the Concourse E lobby.
STL - Designated enclosed smoking lounges in all terminals. (supposed to be closed 2011)
*TPA - Designated smoking area areas at A, C, E and F.

* = Third party information, confirmation required.