That Denver's Chicano Humanities and Arts Council is celebrating thirty years on the local arts scene is no surprise. Few grassroots non-profit arts organizations have as much wherewithal when it comes to sticking to the plan. Now as entrenched as an ancient tire rut burned into a road paved with San Luis Valley mud, CHAC will fete members old and new with two shows Imagination Celebration and La Familia 30th Anniversary Members Show both of which open tonight and continue through April 26. Featured will be founding member Al Sanchez's I Am CHAC painting and print, modeled after the Sgt. Pepper's Lonely Hearts Club Band album cover. Additionally, CHAC will auction off a pair of special gifts to the gallery from Beatle wife Yoko Ono: a limited edition iPod Touch engraved with the words "Imagine Peace, Love Yoko" and a signed postcard image of Ono and John Lennon taken during their 1969 Bed-In in Montreal.