So you've decided to come see a hockey game at Rogers Arena. Congratulations! There will be no fun allowed. If you drink beer, you will be required to do so quietly and preferably where no children can see. Singing or cheering of any kind will result in your immediate ejection from the building. Thank you for your understanding. Sincerely, Canucks Sports & Entertainment, a family-oriented company.
Seriously, to answer your questions, there's no segregated seating, beer is served in the concourse at exorbitant prices so you can drink while you watch, singing isn't done because cheering is supposed to happen when something happens in the game that's worth cheering for (a hit, a goal, a good shift, a penalty kill, a fight, whatever). Rogers Arena is generally known as a pretty quiet and corporate atmosphere, it's not a very loud arena except during playoffs. You won't really have to worry about opposing team support as there won't be many Wild fans in the building. Incidentally, Canucks - Wild games are usually not terribly exciting affairs because of the way the Wild are coached, but you never know.
As for actual etiquette, here is what you need to know.
-If Roberto Luongo is playing in goal for the Canucks, all big saves made by him must be followed by saying "LOUUUUU" as loud as possible. They're not booing. However, make sure that Luongo is actually starting before doing this or you'll look like an idiot.
-Learn the rules, watch a couple of games before you go, avoid being the guy who can't understand why they blew the whistle because that one guy shot the puck down the ice.
-Do not lean forward in your seat during play. Biggest rookie mistake and huge annoyance to people sitting around you. The arena is designed for you to sit with your back against the back of the seat, otherwise the guy behind you and beside you will have their view blocked.
-Generally the arena staff will not allow you to go from the concourse to your seat during play (so that you don't block people's view trying to sit down). When they do let you in, get there as quickly as possible, just try not to spill beer on anyone on the way.
-There will be lineups for the washrooms at intermission so either go during the period during a TV timeout or be prepared to wait.
-If the Canucks score, you're permitted to stand up and yell and cheer or whatever. Otherwise, don't be that guy who's standing during a fight. It's annoying.
That's all I can really think of for now.