Mexico in Epcot...grrrreat Margaritas!
Anywhere in Epcot really, the kids can do the Kidcot Funstop while you two sample each country's offerings!
Pool bar is a good idea. Go over to the Polynesian, even if you aren't staying there and let the kids play in the sand on the beach There is a cute beach bar there you will enjoy. Time it to watch the fireworks at Mk and it's an added bonus!