I see that the St. Andrew's Society of Colorado is having one on the 26th at the Denver Marriott Tech Center. Cost doesn't look bad as these things typically go, and non-Society members CAN attend at a slightly higher price:

http://www.coloradoscots.com/the-burns-supper.html

I'd love to get my brother and his family to it (they live in the area), but he has this Scottish sense of thrift. . .