Golfsmith has the same monitors as Roger Dunn, but the roger Dunn store in Santa Ana, CA has at least 8 lanes all with monitors. Plus there are fitting centers for Titleist, Callaway and Taylormade.
Going to check out the Golfsmith superstore in Irvine as well, that might be pretty good too.
My local ones in Pasadena CA have setups for lefties, so I like going to them. Their equipment is pretty well maintained and reasonably accurate. We have ranges nearby to "calibrate" the results. Plus my local golf courses have pro shops where they allow you to test clubs right on the driving range. The balls on the range go about 10% to 15% of a Titleist pro-V1, for my handicap they are virtually the same.
I am sure that you probably have places within 30 miles as well.