Evening and part-time openings around Spokane - what worked for you?

I am looking for part-time work that fits around school hours and found a few evening shifts near Spokane. I have read a lot of threads here and could not find my exact situation. Shifts are four to six hours and the pay is weekly. How many hours do they guarantee?

Thanks for writing this out. I went through something close to it 14 months ago, and it got easier once I kept a simple log of every call and form.