If I am not mistaken Senor Frogs is closed...I haven't been back to Aruba since November, so am not sure if they have re-opened...sorry to speak out of turn Arubalisa, but last year we walked past the square and thought it was closed.
Anyway, MamboJambo's is always rockin in the evening, and depending on whether you can stand the loud music and young kids...there are a few clubs beside Carlos and Charles that you can check out. We stay at the Divi, but kind out meandor around at night and even hit a few of the locals bars and party with the islanders........Moomba Beach is always a blast, check that out for sure
Also when you get to the hotel you can ask for a list of the hotels happy hours and then try a few in the evening that you liked during the day

Aruba, my home away from home !!