Beginning to learn any instrument is always easier when you can learn with others. Because of this I require at least 3 people who are focusing on guitar to register for the class. Not only does this make learning more fun but also more affordable for everyone.
Ten week contracts have typically been the way that I have set up these classes. There will simply be a start date and end date and a policy for classes missed. Once the 10 week contract is up people are more than welcome to sign up once again for another session.
Younger players I don't normally encourage to start guitar lessons. If a child would like to learn guitar, I suggest they enroll in the MYC® program in order to gain a good fundamental understanding of music. This will speed up their development on any instrument (especially guitar) and keep them optimistic. I would suggest that anybody (adults included) looking to start an instrument enroll in MYC®.
I have also considered doing a drop in guitar time that is less formal. If you are interested in any of these options though, please contact me!