I haven't traveled much for business in a long time, but I always included tips on the receipts. I never felt squeamish about this. Having worked in restaurants

I haven't traveled much for business in a long time, but I always included tips on the receipts. I never felt squeamish about this. Having worked in restaurants as a busboy during high school and college, I regard tips as part of the cost of a meal, not as my way to reward great service. The accounting department never complained, though I suppose that if the tips had crept up from 20% to 50% it would have.