Yep, there are several transporter rooms scattered around the ship.<br/><br/>However...<br/><br/>Arboretum<br/>Bridge<br/>Engineering<br/>Holodeck<br/>Sickbay<br/>Ten Forward Lounge<br/><br/>None of those are any of them.<br/><br/>As transporter room operations are a function of engineering, the engineering thread is the one that most logically covers activities in any of them.<br/><br/>The main transporter room appears to be on Deck 2 (lower), at the starboard aft end of the corridor. At least, that's the one closest to the bridge... Those plans are not exactly clear.<br/><br/>Memory Alpha doesn't seem to be much help here, either...