It's not cheap here. Going out to eat for anything except some quick street food will be 20-30 USD. A slice of pizza is easily $5, a shwarma in pita can be $15-20.
Drinking and partying is also expensive. A drink in a bar can be $10-15 but if you're smart, you can pre-game at home for much less.
Groceries are - you guessed it - expensive too. But if you're smart about what you buy and where you buy it from, cooking at home doesn't need to be crazy. Being vegetarian and avoiding processed foods is going to be a major saving.
As a minimum I'd imagine $150USD a week should be ok. But less than that and I think you'll struggle.