My wife and I went to Trader Sam's a couple of times last month during our anniversary trip. Went back because we loved it! The bar and bartenders are their own show. So much fun. There are several drinks that, if you order them, you get a show when it's delivered. We ordered the Uh Oa. When they bring it out, the lights dim and flicker, similar to the rain scene in the Tiki Room. Then the bartender/waiter brings out the drink, leading the entire room in a chant of "Uh Oa! Uh Oa!", while he lights the drink. They provide you with spices to throw in, which flame and sparkle.
Most of the drinks came in at just under $10 per person. The Uh Oa! is a two person drink, and it was just under $20 for two. Of course, you'll want to add a tip to that, which brings it in higher.
Highly recommended. Trader Sam's is one of my new favorite places at DLR.
-Bob