In Northern California, best mileage (though without private rooms and the extras opportunities that rooms provide) for reasonable price in VIP chairs is the clubs in Rancho Cordova, which is a suburb of Sacramento. Read tahoecruz's reviews. You can get mileage and some extras at some of San Francisco's divier clubs, but it's gonna cost you.
In Southern California, the undisputed winner is City of Industry clubs. High mileage and extras aplenty.
Give Portland, OR a shot. Good mileage in VIP, but not really extras friendly. And the FN clubs serve alcohol.
No experience with remainder of USA regions. Posts on board address high mileage in some Detroit region clubs, Providence RI clubs, some Florida regions, and some Atlanta clubs.