Today's AM Costa Rica has a great link to "piropos"--Spanish pick-up lines.
http://www.todopiropos.com/index.php No English translations, but some great lines.
Some of my favorites:
Si la belleza fueran segundos... tu, para mi, serÃas 24 horas!!
(If beauty were seconds...you would be my 24 hours!!)
Si tu cuerpo fuera carcel y tus brazos cadenas, seria u bonito sitio para cumplir mi condena.
(If your body were a jail and your arms chains, they would be a perfect spot to serve my sentence).
And the ever popular:
Guapa, dime el nombre de tu ginecologo......para chuparle los dedos.
(Cutie, give me the name of your gynecologist....I want to lick his fingers)
Before using the last one outside of the DR, I'd suggest reading the AM Costa Rica article about the possible consequences.