I went to a polo mathch on Friday for $5.00. For four hours of entertainment, I thought it was fairly cheap. A movie cost about $10 and it's two hours.
Sunday matches are more expensive but like Kitty said, they are ways to knock down the cost. I think it's very enjoyable especially if you attend the game with people you like.
It's all relative, and I hope you aren't talking about my relatives.
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).