Unique Wedding Theme

My b-i-l and his fiance are getting married in a bowling alley. Both the ceremony and reception will be there and they plan to follow the bowling theme. Bowling is very important to both of them and it could help them keep with in a strict budget. They want to go as formal as can possibly be done in a bowling alley, especially with their attire. I`ve had a few ideas. Anything you can come up with to help us out with any facet of this event would be greatly appreciated. I`m pretty crafty so handmade ideas are just as welcome as store bought. Thanks so much in advance for your help.
Tamcraft