It’s a good week to be Elizabeth Berkley. Earlier this week, it was announced that the former “Saved by the Bell” and “Showgirls” star will appear on “CSI: Miami;” she is also set to host a Bravo dance show called “Step It Up and Dance.” Contestants on this reality show will have to master a variety of dance styles, including ballroom, ballet and burlesque (that’s a lot of B’s!). Tony award-winning choreographer Jerry Mitchell (“La Cage aux Folles”) will be on hand to mentor the contestants. No word yet on when the series will air.