Drinking a sip of beer or any alcohol for that matter and riding anything is just retarded in my opinion. My 5 year old little girl rides and to think I'm sharing a riding spot with some body who can't leave the beer at home and just go ride and have a good time without it makes me sick. I say drink at the bar, at home or a party and ride at the dunes and in the trails. The two don't mix, I don't care what you're on. As for trading your bike, I say go for it man. Just don't think being on 4 wheels rather than two is more stable and safer to ride with a drink or two in you because it isn't. Be safe and enjoy it if you get it.