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These things just vary hugely by household. Eating out is $200/month in our budget and counts everylittlething that is not a grocery from the grocery store - fast food, cookies at the religious school bake sale, coffee, nominal fee paid at the door for civic group luncheon, anniversary dinner at nice restaurant, etc. If we pay money to put food in our mouths outside the home, it's in that budget. Other folks take a different approach.Â
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"Entertainment" in our budget is Netflix, iTunes apps, Kindle books, etc. Not food.Â
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For a single-no-kids budget, I'd say do the math on one Ruby Tuesday-level meal, one fast food meal, and one bar trip per week, and call that eating out. Two movies, a book, and whatever you spend on cable/Netflix/etc. for entertainment. Those are just starting places, obviously - but single-no-kids is the time to go out and socialize and entertain yourself, you won't be seeing any two movies per month and having cocktails once per week with friends when you've got little ones at home! 
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If you have (or plan to acquire) suitors who are typically paying for things like movie tickets and food, then divert some money to a "grooming" envelope, because you know that you'll want to get your nails done or eyebrows waxed or something prior to the date.Â