You need to be staying in the Levante part of town.
The Square, Calle Mallorca is the main street where the majority of the disco bars are.
The caberet bars are also around the square.
A good hotel is the Hotel Orange which is actually on the square although you will not hear any outside noise when inside the hotel. It can be quite expensive though.
A cheaper alternative is the Hotel Perla which only does B & B. These are the closest hotels to the square.
Others to consider that are all within 5 minutes staggering distance are,
Ambassador Playa
Helios
Presidente
Pueblo
Venus.
For apartments try http://www.beninter.com
Gemelos 2 & 4 are also about 5 mins walk, a more expensive apartment is Gemelos XX.