The Norwegian company Viking Outdoor Footwear did not succeed in stopping the Benelux trademark registration of Vic the Viking, also applied for shoes.
So, you own a nice fitness club called Work, and then you choose a logo consisting of a stylised W in front of the word Work: so basically W Work.
Every new trademark registration in the Benelux and in Europe is subject to a strict test by the trademark office.
The great thing about European trademark registration is the protection in 27 countries using just one application.