There really is not huge "entertainment" . Every night there will be an "MC" who will ask about birthdays/anniversarys. He will get the kids involved in cocnut races and a limbo contest...and maybe sing a song. Thats it and it happens every night approx every 1 1/2 hours starting at 5:15ish.
In the lounge area, next to the hostess stand, there is sporadic entertainment...1 - 3 musicians.
From wikipedia....
Tambu Lounge - Tambu Lounge is a bar with an attached lounge area, adjacent to 'Ohana on the second floor of the Great Ceremonial House, operating in the evening hours. In addition to a full menu of beverage offerings and appetizers, several resort specialties are available from Tambu Lounge, including the Lapu Lapu, an alcoholic mixed beverage served in a hollowed-out pineapple.[14] Tambu Lounge offers live, Hawaiian style lounge music several nights a week.
The Polys main entertainment is the Spirit of Aloha Dinner Show, at the Luau Cove (not Ohana)...5 nights per week...closed Sunday and Monday.