As the first step towards an inventory system order management would be where I would start. While I am an advocate of a full blown recipe based inventory system none of the ones I have seen and used (When to Manage) work in a way that is user friendly. I believe that it is possible but small steps first. We are using Simple Order which is a reasonable template but it isn't implemented as well as it could be.
We are a restaurant/brewery and would LOVE to be able to integrate our mug club into Emagine POS. They have special discounts that we have to manually apply currently. We'd also like a way to track mug club annual renewals. THANK YOU!