My wife, son, and I are going to Costanoa Lodge in Pescadero this weekend. We're driving (gasp! - though I am going straight to work on Monday via bike while she goes home to SF) but there is a deal for this place if you can bike there.
In the Green Zebra coupon book, available for $25, there is a 25% off lodging and spa services when you arrive Sun-Thu IF - you arrive via eco-friendly transport method. This includes foot, bike, "Alternative Fuel Vehicle" or covered wagon.
There are a lot of other good coupons in the green zebra book, and proceeds go to Summer Sprouts