Thank you all for your replies.

If I do bring something I have to declare, I will play by the US it's rules. I always do. Simple as that, I'm a guest
Although I was considering leaving a couple liters of beer at home, but then my american friends would be very very disappointed

I was worried about having to wait in an office for 30 to 45 minutes in order to get my stuff inspected, fill out some paperwork and miss my flight, all to collect a dollar