How about zero? The economy is terrible, the cost of living is through the roof and it is completely understandable that these days that people won't be able to be self-sufficient the day they get out of college.
But the idea of parents paying for things like travel and entertainment is beyond ridiculous. If I found myself in such a situation I'd be grateful to be given a place to stay (I'd also expect to pay rent along with doing whatever chores I was responsible for while living at home before). I can't imagine expecting to be entertained at parents expense.
When my younger son who was dyslexic and had dropped out of school turned 18, I told him that his older brother who was in the military said when his friends mustered out and went back home, they were paying $200 a month for room and board (1991). My son said, “OK, I’ll move out.” He and 4 friends rented a 4 story run down town house for $350 a month. He met his future wife there, and he is now married with two children and doing reasonably well financially, and is happy with his life.