MWR related funds are the easiest to cut. With so few people having a legitimate connection to the military these days, its very popular to say, "Why are these Soldiers, Sailors, Coasties, Airmen, and Marines having fun wasting our money? Shouldn't they be focusing on their jobs and deploying?"
How cool would it be if a service member could book the service band for their wedding- free of charge as long as it's close to base and they're available? I've been through so many ceremonies where the 2d Marine Air Wing band, or whomever, played the typical marches, the Anthem and the Hymn. But I'm sure those folks would play weddings and other parties well!
My band does play some off-duty gigs, but it is a pain, because we cannot use our military-issued instruments/equipment. We have to rent sound reinforcement gear and pass that price along to whomever is hiring us.