Westin: The marina (for us) was about a $4-5 taxi ride. For me, the grounds at the Westin (Nikki Beach) were fantastic - if I had to spend a few bucks on drinks in order to use the beach and pool, the Westin is where I'd head.
With the Marina right across the street from the Westin, you probably get double benefit - it's a nice walk along the marina, Victors (and other restaurants) are great, and the massage place (Millenium) with great prices is right there too.
We had a couples massage in the beachside tent. I was not prepared for an "outside" massage, but it was private, and very relaxing. Soothing music, wind chimes and the sound of waves -- what more could you want! If you follow the previous directions you'll get to the Krystal. It's at the end of the street. About a 15 minute walk.
We sooooo enjoyed our massages.
A massage at the Krystal was a highlight.