Not to mention an excellent occasion to meet girls you'd otherwise never see in a bar or a club. They are wearing their nice clothes and took good attention to look good, you often even have an occasion to get them to dance.

Have you considered celebrating obscure holidays? I know some Americans who celebrate Guy Fawkes' Day just because it gives them an excuse to have a party and burn someone in effigy.

If you get some friends on board and act like what you're doing is perfectly normal, you probably won't be hassled about drinking in public. Everyone will assume that you're supposed to be doing whatever it is you're doing.

You should move to Europe.