It is not expected in France as they get a decent wage and service is included in the price. People tend to just round up or leave a couple of euros if they feel like it. I have had a worker chase us down the corridor at the DLH as we left our hange as her tip and she thought we had gone it hour it, she was surprised we tipped.
Having said That we tipped the bellhop ¬5 when he bought our cases gone room