Bugaloe Beach bar on the pier in front of the Radisson has live music on Tuesdays and I think Fridays? You can check out their facebook page to see exactly. Last Tuesday the band was good. They played everything from classic rock to Maroon 5. People were dancing and it was great. We also saw a band at Moomba Friday night called Equator - they played good cover songs too.
That band is AWSOME!!! I think that their name is Joy Ride.
I love Aruba and it really pains me to say this, but the entertainment that I have seen at the various hotels, bars and casinos has largely ranged from marginal to pretty awful. Is it a matter of the hotels and bars just going with the cheapest option or hiring friends and family, knowing that the tourists are going to come anyway? Having someone play a guitar, saxophone or keyboards and sing badly along with pre-recorded tracks seems to be the norm far too frequently.
I know there are some talented people on the island, people that are capable of much better performances. Who are they and where/how can I find them when I'm there?
Your observation of the local entertainment scene is spot on! You haven't truly seen bad until you've seen the Aruba Sinatra.