Perhaps you would like to take heed of some life lessons, that I learnt the hard way, so that you don't have to.
Lesson 4: No matter how much a certain marsupialesque friend tries to convince you to eat at the worst eatery in your old hood because 'it's her favourite'; do not give in.
Your fears are correct and will likely end up in a vom trip to the toilet later on in the evening.
Solution: Trick said friend by telling her you called and there are no bookings available. If she doubts this is true (as it is extremely unlikely) continue on and use any form of bribery to avoid. Eating the worst ravioli and calzone of your life and paying for the 'privelege' of horrendous food and stomach pains is just not worth it.