The Poudre River Irregulars play at a wide variety of events. Public gigs include a variety of scheduled appearances (concerts sponsored by jazz societies, for instance), and a recurring monthly gig to sellout crowds at Avogadro's Number that takes place on the First Friday of every month.

  Our First Friday events are temporarily on hold due to the corona virus situation.  We will keep you posted.

You can book the Poudre River Irregulars. We play for parties, weddings, swing dances, church services and funeral marches, plus more!  In addition, the "Mini-PRI", a stripped-down version of the band, is available for groups with tight budgets. To arrange private bookings, use Contact above in the menu.

We hope you'll come and hear us play.

The "Regular Irregulars" are Charlie Smith or Larry Lagerberg on trumpet, Len Kellogg on trombone, Clark Burnside on clarinet, Ray Leake on piano, Alan Sparks on bass, Rory Thomas on banjo, and Oscar DeZoto on drums.

First Friday at Avo's 

Outdoor event with masks and distancing

Go to to reserve a table

Advance reservation of tables only

2pm to 4pm -- Next date TBA due to cold weather and the virus

at Avogadro's Number located at

605 S. Mason, Fort Collins, 

Hot Jazz with the Regular Irregulars

Northern Colorado Traditional Jazz Society

Become a member today!

At Avo's for First Friday, an advance table reservation must be made and paid for by someone who will be the host for the table.  The host can have guests up to the table capacity.  Most tables have a capacity of 6 for $60, but a couple have greater capacity at a higher price.  Reservations can be made online at: or by phone at:  970-482-1756

Social Distancing, wearing of masks and frequent hand washing are required.