There are tons of track days, just do a search on them to find one in your area.
They usually cost about $130 per day
They usually separate riders into 3 groups.
Beginner, intermediate and expert. If your a beginner they may make you take a short class at the beginning of the day and have rules like passing is restricted to the straights and the outside of corners.
The intermediate group are usually people who have previous track experience, and allows for passing anywhere on the track. A safe passing distance must be maintained at all times.
Expert group is for fast riders with a lot of track experience, This group is for the most experienced riders as well as racers, this group usually allows for inside or outside passing any place on the track.
Your bike also must pass a safety inspection, there are requirements for the wiring on your bike, tires must be new or close to it, you have to cover all your lights, and preferably disconnect the fusses to them, and take off or fold in your mirrors, etc.
You must have full leathers, they may be 2 piece, but if they are, they must attach at the waist along with full face helmet, gauntlet gloves and over the ankle boots.
You also usually must provide proof of medical insurance.
At the track they usually have instructors that will help you for free, along with medical personal if anything happens. And you can usually rent a pit/garage for the day if you want.
Then through out the day, they have different groups on the track, so you usually ride for 20 to 40 minutes, then take a brake while the other groups go out on the track.
I haven't done one yet, but I'm obviously interested, hence the research I've done already.