Wehav -- Definitely! Last week at the picnic/hike I went to everyone had made various concoctions to bring with them. Anytime I'd be chatting with someone new they'd offer me whatever they were carrying. It took me half the day to realize they stopped listening after the word "no", and my little explanation was totally unnecessary.
That's really awesome to hear about your brother. I'm really nervous about going home this summer and need to remind myself that my family probably more than anyone else will be glad that I'm not drinking.