I made these last night using Shiner Ruby Redbird, which is a grapefruit and ginger beer from here in Texas, and they've definitely become my go to insert-beverage-here waffles.
Using a brand new waffle maker of unexplored abilities, the outsides were nice and crisp and the insides were soft and fluffy.
I got ten 4 x 4 Belgian style waffles using slightly more than 1/4 cup per waffle. Textures inside and out were perfect - this is without beating the egg whites, and halving the butter.
I think anything Belgian/white/wheat/lighter/not things college kids drink would be tasty in this waffle.
You could definitely smell the beer as they were cooking, and the flavor came through a bit, but not so much as to be overwhelming.