Cracking me up! Yes, by all means, drink. It's an odd question for me, too. You must read and share Three Martini Playdate which put some things into hilarious perspective. I'm not about to ask my three year old to mix my margarita (because it would probably end up with dog fur in it) but it's fine for them to be exposed to it. Last night she asked for a glass of pretend wine instead of tea at the tea party. I could only laugh b/c I was having a real drink!
On that note, the last playdate I hosted had 5 moms splitting a bottle of wine before we ordered pizza and let the kids tool around the driveway on their bikes. It was a blast because it felt sort of forbidden. We giggled more from that then the wine. Next time we'll try two bottles (I may be kidding).