Tats to use for Biker Horror movie

I need to make 3 actors look like they have tattoos. 2 guys are from a Northern California biker gang and have both been to jail. They're both kind of solid good guys who've done some time. The third guy is a jackass with white power tattoos; the first two guys kick his ass. I'll be picking out designs for them. What should I use, what are good choices? What do some of the tats mean? I can't do full sleeves and heavy work, but I'd like to pick some badass stuff that looks authentic. Thanks