HATHA means sun moon. Hatha Yoga refers to the uniting and harmonising of the two opposing currents or forces in the universe, Sun/Moon, active/passive, heating/cooling through yogic practices such as:
-asanas (postures)
-pranayama (breath control)
-pratyahara (regulation of the senses)
dharana (focus, concentration) 
-dhyana (meditation),
These practices guide us  to a state of yoga, a connectedness to ourselves, to others, to the everything, creating a sense of harmony in all aspects of our personal being, eventually leading to  that uniting of our individual consciousness with a greater universal consciousness.  Traditionally this is the purpose of the yogic path. Hatha yoga classes practice in a gentle manner to bring about a sense of wellbeing.
(Suitable for beginners)