The title of Repeat Offenders indicated that each artist in this group show did work in a series. That was a fairly open-ended qualifier, since nearly all artists create their pieces that way. But the handle gave Singer Gallery director Simon Zalkind an excuse to feature artists whom he felt were among the best around -- more than two dozen contemporary artists working in metro Denver. Most were well-established locals, including Stephen Batura, Roland Bernier and Sushe Felix, but the work of a few accomplished emerging talents -- including Brandon Borchert, Katie Taft and Jason Patz -- stood up to the best their elders had to offer.