You can customize this chart to include the conditions you typically find yourself shooting in. For example, you could have a "Tony's Bar" exposure listed on your chart. To get these custom readings, just take a light meter reading and record it. Then place it on the appropriate line.
I've simplified my own chart and have listed only the exsposure for 400 speed film. It is what I most commonly use, but if I happen to use 100 speed, I can quickly convert by 2 stops.
“Believe nothing, no matter where you read it or who has said it, not even if I have said it, unless it agrees with your own reason and your own common sense.” – quote
I myself am made entirely of faults, stitched together with good intentions. -quote