Ashanderai
Explorer
I would simply treat each dramatic "scene" of roleplaying as an encounter with smaller or less important "scenes" being incorporated into larger more encompassing ones. For example, roleplaying a typical tavern information gathering scene could be incorporated with the shopping scene that takes place in the bazaar for the purpose of inspiration points as these might be less dramatic (in most games), but important none-the-less, while a roleplaying scene at a ball where combat is not expected, but meetings with numerous important NPCs is would be an encounter in and of itself for the purposes of using inspiration points. Of course, if combat ensues because of the PCs actions when the DM otherwise does not expect it to does not constitute resetting the inspiration points (as another way to encourage PCs to find more creative means to resolve problems), but any combat the DM has planned should allow for the inspiration points to be reset at full.