You should try Barcelona, amazing city.... great beaches, you can go to the Camp Nou, there's a casino and nice bars and nightclubs. Lots of tourist from all over. Great transportation.
I was there for a week and it was amazing.
I enjoyed Puerto Del Carmen in Lanzarote, mild nightlife and excellent weather
You can go to Madrid. There's a lot of party there and not to much german/british/dutch/french....etc turist. Well... maybe chineses with their cameras taking thousands of photos. BUT WE DON'T HAVE BEACHES :(, Go to Gandía (Valencia) and if you want a source check this out: Gandía Shore TV show http://www.mtv.es/programas/destacados/g... and your dreams will come true LOL XDD JAJAJ
Fyi, Malaga isn't full of British drunks.
Me and my girlfriend are going on our first Abroad Holiday alone next year before she starts university, and after narrowing it down we've agreed that Spain would be the best place for us to go for our first holiday, but we don't want horrible places full of drunken british tourists, but a place that's hot, does have a nice calm nightlife atmosphere and has nice local attractions, preferably on the coast.. any ideas?