Raglan Road is WAY up on our list of favorites. There is, indeed, a dancer on a platform (not really a table) who shows up periodically in the evenings. And an Irish band, too. They are all quite good, and it's an immersive experience all around. The atmosphere is great, lively, and just good for the soul.
Some of the things we've found that were yummy: Appetizers include colpucinno, a soup made of cabbage, bacon, and potatoes (actually, a lot better than it sounds in print.) I really like the dalkey duo, which are little battered cocktail sausages perched on the tines of upright forks, with a dipping sauce. Darn good.
Entrees? I've had Kevin's Heavenly Ham twice. It's ham loin (a bit like Canadian bacon), fanned out in slices atop mashed potatoes and a little cabbage. Very hearty and very Irish. DD has had fish and chips; cute presentation in a paper cone. DW has had their version of shepherd's pie, which comes in a tower of stacked ingredients - in college, we always had shepherd's pie on Fridays (leftovers, y'know), but this is NOTHING like cafeteria food. All three of these are quite good.
HOWEVER - my very favorite WDW dessert is at Raglan Road (it may be one of my favorite desserts ever.) It's Ger's bread and butter pudding. It's a really light, fluffy bread pudding in a crock, with two sauces in little pitchers - one a butterscotch, the other more of a sweet cream-based sauce. Poke a hole in the bread pudding, pour one (or both) of the sauces in that cavity, stir it around ... oh. My. Goodness. It is fine, and worth a trip in and of itself.
I highly recommend you check it out.