Hi George, and welcome to Talking Sober. People have gotten sober and stayed in the restaurant industry, have worked as servers and bartenders, even. It can be done, but you’re right, being in that environment with external pressure to drink can make getting sober a lot more uncomfortable.
But you can get sober, no matter what. When being sober became my very first priority, I could then adapt my behavior and change my situations to meet that goal. Being a drunk, I looked to outside conditions and people to make me feel better and to shift responsibility onto when I screwed up again and again. Being sober was an inside job for me. I had to change my thinking and behavior and attitudes.
If you need to take a break from working, like going to a rehab for 2 or 3 weeks, I hope you allow yourself to do that. If you need to start cooking somewhere else, somewhere alcohol free, you can do that. But you can start your sobriety in your own skin and inside your own head at any time. You can get sober no matter where and no matter what.
Check out these lists of ideas for getting sober if you want. Blessings on your house 
as you begin your journey.