Hey... Depends on what you are looking for. If you are looking for party, Merlins has Protest the Hero going on or if you are not really into heavy metal then Mat the Alien is playing at Maxx Fish. Also Savage Beagle is right beside the fish and is usually really good on a tuesday night too. Not to plug another site but you can find out what's going on each day at everydaywhistler.ca.
Have a good one. Cheers.