The instructor-led classes are typically taught at CPLS (Certified Partner for Learning Solutions) sites. You can find a site close to your location by means of the Class Locator:
http://www.microsoft.com/learning/en/us/classlocator.aspx
If you wish to train several people at the same time, you may be able to get a training center to schedule a set of training sessions specifically for you, or you can even arrange a private class to be taught at your own offices. Call one or more training
centers (which you can find by means of the Class Locator) and discuss with them the options that are available to you.