These things are always best dealt with by calling the property directly. Especially in Europe where room capacity may be a fire code issue. Even more, people who may say no to their corporate types will say yes to you as a customer because they value your goodwill.

If it's a problem, it's going to be a problem and you might as well know it directly from the property. If it's not a problem, it's a 30-second call with a quick note on the file and you can rest easy.