Mixing your chairs, like mixing your drinks, can be fun for awhile. But it comes to a point where it's really just a tad foolish. And amateurish.
Choose a style you like and stick with it. This is always more modern.
Having a variety of chair designs for one table is so Rachel Ashwell, and we all know what happened to her. Okay, we don't know what happened to her. Get the point? Even Juday tried this mixing chairs gimmick once (for her restaurant Kaffe Carabana) and even she gave up on that.
*Decorating cliches 1-11.