Indoor putting green at our wedding: cute or stupid?

I think it's a wonderful idea. The groom's cake sounds like it will be perfect and I always like the idea of providing activities for those who don't feel like dancing all night. The putting green would offer a nice option to relax and a fun variation on the bells or wine glass noises for making the new couple kiss. This is an especially good idea if you are inviting some of your fiance's golfing buddies.