I would love it, in fact my ex-wife did almost the exact same thing once. We both had been working really hard (we worked together) and were too tired at night to 'play' not that we didn't have the desire.
One day she says she's taking Saturday off, asked me to do the same and tells me to 'meet' her at a hotel bar nearby at a certian time. I get there, she looks great, we have a couple of drinks and then the big suprise. She's rented a room with a jacuzzi, lots of candles, sexy lingere.
Sometimes I think it doesn't take much to spice up a relationship, just a little thought.