Appointment? So now we're getting appointments to get our MAP cleaned? You know Magic is a form of trick, a slight of hand... just saying...
Also they were supposed to monitor your car's exhaust gases as well, for the job in question. But their specialty is injectors, they'd clean your injectors even if you get there in a craby car. You get there with a broken rubber bush and they'd tell you to get your injectors cleaned coz they're not firing right, causing a misfire, causing engine vibration, causing broken suspension bushing.
Just go to any Honda service centre, they'd be able to help you without an appointment. Honda Gateway should work just fine, since they're closer to your home, not sure if they have ultra-sonic cleaning. Honda Canal is even closer, but they don't have the injector cleaning equipment either, you probably won't need that anyway, and they can take care of rest of the jobs just fine.
P.S. Stay away from the Pit.