SCC had a special deal running earlier this summer - stay 3 nights and get fourth night free. This was good at all of their London and Paris properties, but I think it expired at end of August. I took advantage of this deal in London at the MayFair IC and Paris at the IC Paris, and was able to "double up" this offer with special rates that included upgraded room and free breakfast.
The Paris IC is a very nice property and conviently located with easy Metro access.
One curious difference between the two hotel's interpretation of the free night coupon -- in London the free night included the free buffet breakfast, since that was part of the underlying rate. In PAris they charged us for the breakfast on the free day, even though it was the same breakfast-included rate plan we had in London. We didn't realize we would be charged for breakfast until we saw the bill on checkout, and if we had known we would have skipped the meal, which although was quite adequate was no way worth nearly $50 US for the 2 of us.