Hi Dutch
I lived in Havana for 2 months. I would stay at a Casa Priva 2 minutes to the Hotels and Park Central. Address: Hostel El Parador Numantino Consulado 223 E/Animas Y Trocadero, Central Habana. Tel (537) 862-7629. A great place to people watch is the terrace at the Inglaterra Hotel or the Pastry shop beside it.
For fun at night I would go to Havana Cafe or the Cafe De La Musica (Galiano & Neptono).
Cafe de Oriente (Obispo & San Ignacio).
China Town is a must at night. Enjoy