I haven't as an LPN. From everyone I talked to in RN school. They work 16-32 hours every 2 weeks.
They see it as a recruiting tool and really want to work with you on your schedule.
If you go to their website and search fro positions- apply for one if you qualify. After it closes, they will call you to set up an interview and go over everything with you.
Some positions float all over the hospital some pretty much stay in one place.