I have a sportscar dealer near my school, it has stuff like Lotus, Shelby Mustang, Ginetta and a Load of TVR!
What's yours
HHC (Hexham Horseless Carriages) http://www.tvr-hhc.co.uk

Coolest car at a dealership near me is an F-Type...

Closest authorized dealer is a Ferrari/Maserati three hours away.

Oh gosh, Palm Beach FL... Lamborghini dealer, 2 level Ferrari dealer, Maserati dealer, Aston Martin, Bentley + Rolls Royce, Porsche and Audi

Not much here in Raleigh...there is Maserati of Raleigh and a Lotus dealer in Durham, although I'm not sure if the Lotus dealer is even still open. In Greensboro (about 1h 45m away) there is a Foreign Cars Italia, which specializes in Ferrari, Aston Martin, and Maserati, but usually there are a number of Porsche's and Maserati's there as well. There is also Lamborghini Carolina's a few miles away from Foreign Cars Italia, although I haven't ever been there. In Charlotte, there is another Foreign Cars Italia as well.

Boardwalk(Lamborghini, Ferrari, Maserati, Porsche, Audi)
Park place(rolls royce, Bentley, Maserati x2, mclaren, Mercedes, Porsche, jaguar, lotus, bugatti)
Aston Martin Dallas
RAC( pretty much a RUF dealer with other exotics in its preowned inventory)
Straight line automotive(preowned exotic car inventory)
Starwood(preowned exotic car inventory)
Global import cars(preowned exotic car inventory)
All of these within 25 minutes of my house

in toronto there is a
-mclaren dealer
-ferrari/maserati dealer
-bentley/rolls/lamborghini/aston/bugatti/jag/range dealer called grand touring automobiles
-tesla dealer
-fisker dealer
-porche dealer
-ducatti dealer

Mclaren, British Motor Cars, and a lot of other things I dint remember the names of.

Columbus:
Byers Imports: Jaguar Porsche
MAG(Midwestern Auto Group)(Group of dealers that sell: Ferrari, Maserati, Bentley, Aston, Rolls, Lotus etc.
Toybarn:MAG's used car dealer.

Ferrari, Maserati, Bentley, Lotus Of Denver
Sill Ter-Har Motors ( Lamborghini, Aston Martin, Jaguar, Maserati, Ford, and Volvo dealer.
Stevinson Imports
Rcoky Mountain Eurosport (Currently has a Maybach)

Maserati of Rochester

Jeffs Motorcars: Pre-Owned Exotics and normal cars (Canton, Ohio)
Thomas Classics: Pre-owned Exotics and sports cars (Akron, Ohio)

British Motor Cars (Jaguar, Land Rover, Bentley, Lotus, Lamborghini, Pagani), next to my school in San Francisco.
Ferrari/Maserati Silicon Valley, Redwood City, near my friend's house.
McLaren San Francisco, Palo Alto, also near my friend's house.

Best I've seen:
BMC - Pagani Huayra
Ferrari - I dunno, a 458 Spider?
McLaren - P1

Lake Forest Supercars

http://www.lfsc.com/

Bentley Gold Coast

http://www.bentleygoldcoast.com/

Twin Cities Luxury Auto
Also the dealership i work for is currently negotiating a deal with Tesla to sell Model S at the dealership