We do daily services, as much for our own benefit as for the guests.
Better to know if you have a problem,( cooking,smoking, etc). earlier as opposed to later.

Some guests request no service upon knocking, but if we have any doubts, we normally wait till they go out, instead of asking them.

On a personal note, I like my room serviced my room unless it is stated up front.
Apartments differ from place to place