I have macros set for each class for when I am in dungeons. As a PLD, for example, I start a dungeon by saying the Night's Watch oath. If people respond, then I continue with the RP. Most people seam to be into it, but from time to time either no one responds or they say no RP please and Ill just stop. I have different text macros for different abilities, as well as when the dungeon ends. I find PLD to be the easiest (and albeit most basic) class to RP as. but thats just my .02.

I tend to only be able to do this in dungeons as there is really no RP community on Famfrit. I do the basics tho... emoting appropriately to NPC/PCs, kneeling to the dead, etc etc. If I catch someone examining/looking at me, I usually wink or bow, or give a quick Hail! to a friend if I see them about