The Red Onion Saloon is one of Skagway's most visited establishments, part bar and part living history exhibit. The building dates from 1898 and operated as a saloon and brothel during the gold rush. The upstairs has been converted into a small museum with guided tours that explain how the brothel functioned and who worked there.
The bar itself is a good place for a drink on the main street downtown, and the gold rush atmosphere — however commercialised — is broadly faithful to what this part of Broadway once was. It gets crowded when cruise ships are in; evenings are more relaxed.