Another hotel

When I got back from Yosemite late on Thursday night, I asked at the front desk why the room rate goes up from $179 to $249 a night for Friday, Saturday and Sunday.  Demand for rooms, was the answer, and it was clear no chance of any discount, so I checked out on Friday morning and less than an hour later, I'm in my room the other side of the bay at the Courtyard Marriott in Oakland, costing $99 a night instead.  It's a 20-minute BART ride to San Francisco (costing $3.10) and it saves me $450 in total.