By all means rent a scooter for daytime sightseeing
BUT do not think about using it for travel to Sosua at night. Renting a car would be a better idea.
May is a very quiet month for tourists (think more chica availability)
Check out the Cabarete chicas forum for locations etc, the info is still valid.
http://news.insearchofchicas.org/for...play.php?f=689
No curfew, bars open in Cabarete till 3am every night, (shit I was in one till 5.30am last Saturday night,) Ocean Sands Casino nightclub till 5am Fri and Sat (with strippers). Sosua clubs stay open till 4am Fri/Sat
I live in Cabarete so feel free to ask away. You'll have a ball.