check out "the corinthian" - possibly the most beautiful bar in the world
depends what you are into really? night life or museums or adventures?
xscape at braehead is good - has laser quest, indoor skiing and snowboarding with real snow, adventure golf, wall climbing, cinema, a mid air assualt course, football school, bowling, shops and restaurants.
glasgow has a lot more to offer than edinburgh, but it also has more idiots too, if you want to go out at night, stay away from sauchiehall street and try to stay in merchant city