ok, the city you want to be in is either Tel-Aviv or Eilat.
stay away from Jerusalem.
you can book yourself in Hilton hotel in near the beach in Tel-Aviv and check the night clubs in Alenbi street.
but at the night clubs stay away from the crowd to avoid suicide bombers.
Eilat is one of the most attractive sunny cities in Israel, many Israelis spend some vacation time there:
http://www.eilat.com/