Frustrated noob.
I had left a club for that very reason. My time is just as important to me and there is guilt asking someone to stop their fun to work with me.
The club I joined (and now am president of) has a structured training program. As my time was important I was specifically looking for more organization. From what I was told, originally instructors were almost avoiding the field because many students felt it was their 'right" to be instructed at their own convenience. (Hey instructors sometimes just like to fly their own planes too)
What was decided (before my time) was that Wed eve from 6:00pm to dusk and Saturday morning 9:00am - 1:00pm were to be designated for students only. That means our instructors knew when to be at the field for training and students knew they would get to fly at those times because we would have instructors there.
The only ones in the sky are students. When I heard about this, that was my reason for selecting the club. (many new members tell us the same thing)
Sure some students get to fly outside of student times, if a separate arrangement is done with the instructor at everyone's convenience but students are also told that they can't expect to be instructed outside those times.
Seems to work for all parties and we've been quite successful (also gives training time for instructors as well)
Nuker