Robin Williams and Nathan Lane are birds of a feather in Mike Nichols’ lightweight comedy The Birdcage (B), based on the French classic La Cage Aux Folles. Their tale of an alternative American family is filled with larger-than-life gags. But for all the preening queens run amuck, there are actually some nice domestic moments between the central couple and the son they reared together that blaze some trails on acceptance. It’s super-funny and proof that it takes all types to make a family.