The vaudeville entertainment given in the Living Room of the Union last night was very successful. Of the four numbers the best performance was that of the Japanese acrobats, which was exciting and spectacular to an unusual degree. Al Fields, the monologue comedian, gave an amusing skit and sang several songs; the Empire Quartet, represented by but three of its members, overcame all the difficulties, of its situation. and Dixon and Anger, the German comedians, succeeded by noise, gesture and expression in creating considerable fun.