Can a Parking Lot Sign Mandating Arbitration Be Enforced?

If this is the question we're answering, I think the answer must be yes. If the signs are found to be conspicuous and the driver is given the opportunity to leave without penalty once they notice the sign and disagree, how can noticing the sign and then leaving your car in the lot be considered anything besides a voluntary agreement to the terms stipulated on the sign?

I would be more cautious if it was buried in some kind of, "Scan this QR code for full details", but it's right there on the sign for anyone to see.

I would say the same thing with a grocery store, not that I think any would do it, if the sign is clear and conspicuous how can going into the store and making a purchase be considered anything else except agreement to the terms posted on the sign?