I don't know of any streets around here I can do that with the posted speed limits, second of those I could do it would have NO room for any variables like road conditions or the worst cagers in my lane.
Did my first 4 track days on a Tiger 1050, which is far from ever being a track bike.
A ninja off the show room floor is more of a track bike than a tiger will ever be.
Cost's in my state any moving violation is minimum $160, if your doing 10 mph over gets real expensive quick so compared to a track day it's a no brainer, not mentioning points and increased insurance.
I don't consider the track a
super controlled environment
3 rules I can think of, how to merge on the track, how to get off the track and 6 foot passing rule in my group.
SO if you can do that on the street you have some great basic skills that would really shine on the track.
Do yourself a favor, figure out how to budget for 6 track days. If you feel the SAME WAY you do now after 6 FULL track days and don't admit you are having more fun on your bike than you ever have had. I will eat my words.