At West Music we offer lessons once a week for half-an-hour.
Half-an-hour may seem like a long time when you're just learning an instrument but, believe me, it goes by fast!
When you factor in time to tune the instrument, warm-up, and review what you learned last week, plus add on the new things you are about to learn, the lesson is full. Offering lessons once a week gives the student time to practice new techniques.
Occasionally, I get requests for lessons on alternate weeks. Sometimes the reason is financially based or because of scheduling issues. Usually though, it is because the student is not sure how interested they are in learning music. In that situation I would still recommend taking the weekly lessons.
If you aren't sure whether you're interested in doing something, then only putting up half an effort isn't going to help you decide, and you're likely to quit too soon.
In order to decide if you're really interested in studying music, you need to make a commitment.
West Music does not make you take a certain number of lessons like other places, but you should take weekly lessons for at least a few months in order to really give it a try. And if after those few months are up and you are still not interested in lessons, then you know you at least gave it your best shot!