Welcome to the area!
We are 2 married guys and dont live here full time yet but have a house just inland from Orihuela Costa, we are here about 3 months of the year and this is what we've found so far...
Generally speaking people are nice if you dont flaunt it in their face, I'm sure you dont need me to tell you to be respectful and mostly everyone will be the same.
Chandalier bar in La Finca is run by 2 guys, there is also Les Planches on Torrevieja marina, Jax bar, Phoenix dance club iand Zoo disco pub in Torrevieja, OMD (Boys) pub La Mata. There is a bar in the square in Dolores which is quite mixed and also up Avenida de Los Palacios near Rojales, Mokai club, Benecal club and the Queens bar is worth a look.
Good luck and enjoy exploring :)
Ian