You get the Entertainment Rate from the Entertainment coupon book. You know how you can buy those books that have deals and coupons for local area businesses and attractions? Its in one of those.
I've never done it but people on here have said they've bought the coupon books off of eBay.
As far as other Good Neighbor deals, other people have gotten very good results with Priceline. Only downside is that you don't know what you're bidding on until you've bought it! But if you know the area well, you can figure out which hotel it is.