Traditional Thai Dance

Hello,

My (Thai) wife has been very interested in traditional Thai dance for many years, but she's been shy to get any formal schooling in it. We've lived in the states for several years but are planning an extended trip back to Thailand for a few months and she'd like to take some classes while she's there. Can anyone point us in the right direction to find out some information on traditional thai dance classes? She has family in both the Bangkok and Chiang Mai area so either area would work fine for us. She's looking to devote a good amount of time to learning (something more intensive than just one hour a week for sure).

Thanks for any help you can provide!

Jay and Aruya