Mr Z

AI Prompt for Business Dinners on a Diet: By a Coach

Francesco Zen, founder of ZTraining · Published 9 July 2026 · Updated 9 July 2026

The prompt

Copy-paste prompt, built from 18 years of coachingAct as my coach for a business dinner where I need to eat on plan without making it obvious or awkward. Before answering, ask me for: what time the dinner is, what is left of my calories and macros for the day, the type of restaurant if I know it, and whether alcohol will likely be involved. Once you have that: 1. Tell me what to eat beforehand, if anything, so I am not starving and rushing decisions once I sit down, without eating so much that dinner itself becomes redundant. 2. Give me a specific ordering strategy for that restaurant type that looks completely normal to everyone else at the table, nothing that signals I am on a diet. 3. Help me pace the meal against the conversation, not the other way around, since the point of the dinner is the relationship or the deal, not the food. 4. If alcohol is likely, tell me how to handle it without either standing out by abstaining awkwardly or derailing the day's targets, a realistic middle path. 5. Address dessert and post-dinner drinks directly, since these are usually where the day actually goes off plan, not the main course. 6. Remind me that one dinner handled reasonably well does not require compensating the next day, no starving myself to make up for it. Ask me the setup questions now, before giving me a strategy.

Why this prompt works

A business dinner fails as a normal diet situation because the actual goal in the room is never the food, it is the relationship, the deal, or the impression, and any strategy that makes eating visible or awkward works against that goal even if it hits the macros perfectly. This prompt treats social invisibility as a real design constraint, not an afterthought, because a strategy nobody would actually use in the room is not a strategy.

Pre-dinner eating and dessert are addressed directly because they are where the day usually actually breaks, not the main course. A sensible small meal beforehand prevents the rushed, hungry decisions that happen at 9pm with a menu in hand, and having a plan for dessert and drinks before they are offered beats deciding in the moment under social pressure.

A real-world example

Take an executive with a client dinner at 8pm, moderate calories left for the day, and wine expected. The right output includes a small protein-forward snack beforehand, a specific ordering approach for that restaurant type that reads as completely normal, a realistic plan for one or two drinks rather than either matching the table or abstaining conspicuously, and a clear stance on dessert decided in advance rather than negotiated at the table.

None of this should require explaining anything to anyone else at dinner. That is the actual test of whether the strategy works.

Where a single prompt hits its ceiling

A prompt cannot read the room, whether declining a round of drinks will actually land fine or genuinely cost you socially in that specific relationship is a judgment call it has no way to make from a text description.

It also cannot adapt mid-meal. If the dinner runs three hours longer than expected or the menu turns out nothing like anticipated, the plan made beforehand does not update itself, you are working from a script that was already written before reality changed it.

Common questions

How do I eat on plan at a business dinner without it being obvious?

Plan beforehand rather than deciding at the table: a small snack before you arrive, a clear ordering strategy for that restaurant type, and a decision on dessert and drinks made in advance so nothing looks visibly different from what everyone else is doing.

Should I drink alcohol at a work dinner if I am trying to lose fat?

A realistic middle path usually works better than either extreme, one or two drinks handled deliberately rather than matching the table's pace or abstaining in a way that draws attention and adds social friction.

Does one business dinner ruin progress for the week?

No, a single dinner is a small fraction of a week's total intake, and it does not need compensating for with restriction the next day. The bigger risk is usually the anxiety about it, not the meal itself.

Francesco Zen is the founder of ZTraining and ZLIFE, with 18 years of coaching experience working with executives across the UK, US, and UAE. He built Mr Z, an AI coach trained on his methodology to bring the same approach to a wider audience.