What nightlife? Lots of bars and saloons. And one positive is that all bars are non-smoking now and so are all restaurants. What a blessing. The other nightlife? The bookshop on Main Street is open until midnight in summer. Go to the library for Internet -- open every day. One can reserve up to one hour for one week in advance -- really good service!
Whitehorse is a ton of fun in the summer. All the live music, the food was really good.
Nightlife in Whitehorse during the summer can be awesome! Lots of live bands and local talent, as well as a neat mix of people to meet. Check out "Mamma Martini's" for food or its adjoining bar "Lizards" for really cool live music.
Whitehorse is a great city for the outdoor enthusiast. Make sure you take a dip in the Takhini Hot Springs. If you're looking for nightlife though, look elsewhere.