How do I cope with faking warmth for tips at work?

You can run a full section without a slip, and you are tired of the warmth you have to perform for tips, the smile that is part of the wage. That fatigue is real. There is a particular exhaustion in selling a feeling all shift, and it is honest to admit that it costs you something. But consider that not all of the warmth is fake. The skill you have built, reading a table, easing a stranger's bad day, making people feel looked after, is a genuine gift, even when a tip depends on it. The tiredness comes from the performing, not from the kindness. Those can be separated. You can give real care without pouring out your whole self for every table. Protect the difference. Give people genuine attention, but keep a private part of yourself that is not for sale and not on the floor. Let the smile be a tool you pick up and set down, not your identity. The warmth can stay real precisely because you stop spending all of it. Guard the core, and the shift costs you less.