yea I have this problem....although I've noticed that my coworkers don't really have much to say either, so I don't think the problem lies solely with me.....but yea, at first we all had a fair bit to say, but these days we tend to just talk about the weather and work stuff.....but I think there's always wiggle room here and there if you look for it....like, I quite often ask my coworkers what they're up to on weekends or holidays and sometimes that can be a nice way into finding out something new about them. Like with the world cup recently I found out one of the old guys is really into football, so we've talking about that everyday now!
it is difficult though.....I still spend most of my time avoiding them so that I keep small talk opportunities to a minimum!