I found this list on the internet of the number or roulette wheels in Las Vegas... Looks a little outdated.

LAS VEGAS
Caesers Palace - 13
MGM Grand Hotel and Theme Park - 12
The Mirage - 12 - Includes Single Zero
Flamingo Hilton - 10
Luxor - 9
Treasure Island - 8
Ballys - 7
Circus Circus Hotel and Casino - 7
Harrah’s - 7
Excalibur Hotel and Casino - 6
Las Vegas Hilton - 6
Rio Suite Hotel and Casino - 6
Stardust Hotel and Casino - 5
Binion’s Horseshoe - 4
Desert Inn Hotel and Casino - 4
Palace Station Hotel and Casino - 4
Sam’s Town Hotel and Gambling Hall - 4
Gold Coast - 3
Golden Nugget Hotel and Casino - 3
Hard Rock Hotel and Casino - 3
Imperial Palace Hotel and Casino - 3
Jackie Gaughan’s Plaza - 3
Riviera Hotel - 3
Sahara Hotel - 3
Texas Station - 3
Aladdin Hotel and Casino - 2
Arizona Charlie’s - 2
Barbary Coast Hotel and Casino - 2
Boomtown Hotel and Casino - 2
Boulder Station - 2
California Hotel and Casino - 2
El Cortez Hotel and Casino - 2
Fitzgeralds Hotel - 2
Four Queens - 2
Fremont Hotel and Casino - 2
Frontier Hotel and Gambling Hall - 2
Holiday Inn Boardwalk Hotel and Casino - 2
Lady Luck Casino and Hotel - 2
Maxim Hotel and Casino - 2
Santa Fe Hotel Casino - 2
Silver City Casino - 2
Slots A Fun - 2
Tropicana Resort and Casino - 2
Bourbon Street - 1
Casino Royale - 1
Continental Hotel and Casino - 1
Fiesta Casino and Hotel - 1
Gold Spike Hotel and Casino - 1
Golden Gate Hotel and Casino - 1
Hotel San Remo Casino and Resort - 1
Jerry’s Nugget - 1
King 8 Hotel and Gambling Hall - 1
Las Vegas Club - 1
Nevada Palace Hotel and Casino - 1
Pioneer Hotel and Gambling Hall - 1
Poker Palace - 1
Royal Hotel and Casino - 1
Showboat Resort and Casino - 1
Western Hotel/Casino - 1
Westward-Ho Hotel and Casino - 1
Stratosphere - ? - Includes Single Zero

Steve in Albuquerque