To celebrate Guster's upcoming Denver concert, the band's members want to jam ... and smoke ... with the locals.

The inaugural Guster Pot Jam will take place Jan. 18 in Colorado, one day after the band plays Denver’s Ogden Theater.

According to the band’s official web site, the jam offers “an afternoon of musical exploration where we all try pot for the first time.  Luke might not inhale.”

To enter, email [email protected] no later than 5 p.m. EST January 12 with the subject line “Pot Jam Entry” and the following information:

– Full Name
– Date Of Birth
– Phone Number
– City, State
– Why should you get picked to smoke weed and jam with Guster?
– Level of musical experience
– If you get picked, how do you & your guest plan on getting to Denver, CO on January 18th?
– Twitter and/or Instagram username (if you have them)
– Links to any performance videos you want to share (your Guster cover on YouTube, your best best guitar solo, etc.)

Three winners will be chosen, and each can bring one guest. Entrants must be 21 years of age or older. Guster will provide the instruments … and the munchies.

The band’s new album, “Evermotion,” drops Jan. 13.