Well... I live with my parents, and I spend around 600$-500€ per month.
I do every day 60km to go work and back, but my car is diesel. I don't pay dinner, and at lunch eat at the restaurant but I spend between 6€-8€ per lunch. I do some kart races every month, but they're 60€ - 1 hour races.
Then there are all the other things...
I think we don't earn much money here in Portugal, but the living costs isn't very high either, so I think it's ok. It's just bad because cars and electronics here are at the same cost... only the "essencials" are cheaper!
In a few months I'm thinking in marrying, and then I'll have to pay some 500€ month for the house. (Kitchen, Living Room, Bathroom, 2 bedroms),
some 50€ for the internet and cable TV, and so on.....