Despite its isolated nature, Yellowknife has a well-developed telecommunications infrastructure. High speed internet and wifi is plentiful. If your hotel/B&B does not offer free wifi you can also obtain this legitimately from a number of spots throughout the city.

Javaroma  (Downtown - Northwest Building - 5201 50 Ave)
Yellowknife Airport
Yellowknife Public Library (2nd floor of the Centre Square Mall - 5022 - 49th Street)

Bayside B&B - 3505 McDonald Drive, Yellowknife, NT

The City of Yellowknife - All sports facilities opened to the public: Multiplex, Fieldhouse, Swimming Pool, etc.

Tim Horton - Located near WalMart on Old Airport Road.

McDonald's Restaurant - On Old Airport Road, and inside WalMart. 

Listing is up to date as of December 2014