Multi color cast and lack of sharpness of pictures taken in concert.

[airphoto38]

Pictures taken at concert without flashlight seems not sharp with multi colour cast. Is there anyway that I can improve those pictures?
Appreciate your advice.

 

[coke21]

Pictures taken at concert without flashlight seems not sharp with multi colour cast. Is there anyway that I can improve those pictures?
Appreciate your advice.

Use a flash.