Here's how it would work:
1) Receive a text by 5pm each day with the day's 2 menu options (1 veg, 1 non-veg)
2) Text back if you want food (which option & quantity) by 6pm
3) Get it delivered by 7pm (first time you order, card + delivery info recorded)
Thoughts?
Except peach serves lunch instead of dinner. They appear to have the restaurants deliver the food themselves. Your office needs to have 50 people who have signed up for the service before they'll start offering menu items in that location.