Coming from the DC area myself and having worked in way too many poorly-thought out spa rooms (and for many, this is a nicer description) in both DC and MD...and knowing that you've been in the business long enough to know what I'm talking about, I'll just say this without giving you a "to-do list":
Build for EFFICIENCY/UTILITY FIRST...with Client Comfort coming in at a close second because you'll find that both tend to go hand in hand. "Foo Foo" comes dead last but don't get me wrong; it's a necessity but not the first priority.
Why? Give your CMT the tools they need within hands reach and you not only have a CMT that's more prepared for more situations but, you also allow that CMT to provide a better flow during the session. And no I don't mean energy...I mean more hands on time with the client with as little break in contact as possible. Ever had to leave the room while your client lays there to get the right oil or cream/warm towels in the only hot towel cabbie in the spa/etc.? I sure have as have many. Ever have a nice warm, comfy table ready for your client only to trip over a zillion electrical cords all ghetto-rigged to the same outlet? Same response. Ever feel like your body mechanics have been thrown out the window due to having the room set up nice only to have the spa manager/owner fill it with half a dozen vases (or insert whatever items you feel here) that not only overdo Foo Foo to look like Poo Poo but have you bunched up like a Para/Schizo worrying that you'll knock one over...which eventually happens anyways? Yeah. Seeing the pattern?
Closing in on a decade doing this and I'm still seeing this kind of thing. I do freelance work here in Germany for a "Leading Spa" and there are days I want to tear the place down brick by brick. We have stuff like a Portuguese Granite Pool, Whirlpools, separate Saunas and more...yet the massage rooms, while looking gorgeous, are some of the most poorly thought out I've seen in years. If you want details, then PM me as I'll probably get flack for just posting this much if the current Director ever comes across this thread. LOL I'll even fill you in on the details of how poor room preparation led me to end up massaging a stressed VIP client to the song "Brickhouse". Luckily, she was american and the retardedness of the moment made her bust out laughing. LOL You learn to adapt, but that doesn't change the reality of the situation and when I see clients paying over 100 Euro for a basic massage, I fight the urge to shake my head sometimes.
If you want to get a good idea on building a more efficient massage room, then go see my friends and former IC employers Theo and Olvia over at Somafit in Georgetown. That is, by far, the best place I've done freelance work for in my entire career and their massage rooms (while not perfect) will provide you a good base for what you're looking for in my opinion. Being that Theo and O are both architects, their rooms blend style and efficiency very well. Room 4 was one of the bigger rooms and Room 7 was one of the smaller ones so either get a massage or just ask to see both on a slow day. Tell Kelly the manager that Steve sent you and that I used to work there before I went to live/work in Germany for looOOOoove.
Also tell them that I miss them all.