Research your race and culture and use this as an avenue for conversation. Try to find others that appear to roleplay their culture by examining their demeanor or manner of dress. You could lead in with a comment on their clothing or making a witty remark at the expense of an adverse race.

Religious preference could also be used in this regard, though I personally have found few that are devout in game.

[Edited on 2-17-2004 by Fallen]