I suggested an ability for Wittelsbach that could give everyone allied to them access to a Tavern.
But general access to Taverns for the native civs could be seen as insensitive. Alcohol was used to exploit them by getting them drunk before getting them to agree to unfavourable treaties that took away their land. They generally didn’t have a tolerance to it like Europeans did and the stuff they were given was often cut with random chemicals.
Some limited mercenary access could be accomplished by giving them “treaties” to ally with relevant powers like British and French to get access to a few of their mercenaries at the embassy.