I hear Doha's population (interms of couples) have increased drastically in the last 3 to 4 years. Indeed the city has seen a major uplift interms of amenities and housing facilities.

A visit to a decent bar would definitely fetch u friends (as most of them are what u r looking for...couples)

Why to wander, QL has some real interesting people too who are very fit to be family friends.

Socializing scene is not bad if u know how to, but just dont expect too much as u r coming in from one of the world's most interesting cities.

Cheers !
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Think Global...Act Local !