Assuming you are asking if bowling alleys have a dress code- most modern ones do not. There are some that may require closed toed shoes and discourage excessively baggy clothing, but generally speaking, you can wear whatever is comfortable.
A skirt is a perfectly acceptable option for women- especially if you pair it with leggings or tights underneath. You want to be able to move freely when bowling, so avoid anything too tight or constricting. A flowing skirt will give you the range of motion you need to bowl without sacrificing style.