Chiang Mai's female prison has a massage shop, popular by tourists and residents. The women in the prison can learn massage there and earn money and with that they often support their families. As Bangkok Post writes, also women, who have left prison, are working there, because they see it as a way for reintegration in society. Go to the west end of Ratchwitee Road and turn right and you will find the womens prison at your right hand. The massage shop is nearby at 100 Ratchwitee Rd.