In New York City, the minimum wage for waitstaff is $15.00 per hour. Assuming you work 40 hours per week, you would earn $600.00 per week, or $2,400.00 per month.
Roommate
If you split rent with a roommate, you would each be responsible for $750.00 per month.
Budget
In addition to rent, you will also need to budget for other expenses, such as food, transportation, and health insurance. A reasonable budget for a single person living in New York City is around $2,500.00 per month.
Conclusion
Based on these figures, it is possible for you and your roommate to live in New York City as waitstaff, as long as you are careful to budget your money.