Tim Cullen ran into an unexpected obstacle recently when he decided it was time his cannabis business should start donating money to nonprofit organizations.

“I have been shocked at how few places will take our money,” said Cullen, CEO of the Colorado Harvest Company chain of shops and a shareholder with O.penVape, a company that makes vape pens.

But then Levitt Pavilion Denver came calling. O.penVape and Colorado Harvest Company together donated $250,000, becoming the largest private donors of a project to build an amphitheater in Ruby Hill Park in southwest Denver that will host 50 free concerts each summer among several other events…