You can't use clubcard vouchers with any other offer.
Prezzo are in trouble and so is the food hospitality trade so they need to sharpen their pencil with better offers than this. Excluding weekends is daft - though we all know why they do it but that is why they are empty after about 8pm on sunny days like these.
Pretty standard deals really, appearing quite regularly, and usually beaten if you have a Tastecard (assuming you are not eating alone). I don't believe the offers can be combined either.
Ideal coupled up with some tesco clubcard vouchers
But only 1 offer at the same time normally.