Concierge Lounge.

I always do unless there is not an obvious garbage receptacle.

Occasionally, however, I've been intercepted by the employees as I walk with the plates/trash to the pail, and they are courteous enough to take it from me.

I have also been told several times that it's ok to leave it..."we'll get it"...usually only if the CL is empty or its the late night dessert feeding