Looks like they scored it strictly on alcohol/cannabis/cocaine/strip clubs/casinos.
Guarantee the city ranked high mostly because of the marijuana and the number of strip clubs. Funny because the usage of pot here is pretty casual, feel like I'd compare it more with say, drinking coffee, than partying.
By paying attention to bands I already like.
Do I know who they're touring with? Are they posting about other bands in their scene? Maybe they like to post about cool music they're listening to.
I've discovered music from an artist posting bandcamp friday recommendation thread, instagram story AMA's, q&a moments with musicians at shows, showing up for openers at shows, etc.