As a CC native (Flour Bluff actually), I can tell you that if you are single, there aren't many single women to find in CC.
Where are you moving from?
If you are looking for a metropolitan city w/ lots of diversity and cultural events, CC is not the place to be.
Some decent bands pass thru every once in a while, but nothing too special.
CC Hooks (Astros AA club) is fun to go watch and is the only sporting event in the city.
The summer is fun, REAL fun, if you like the beach, fishing, and boating. The city kind of goes into hybernation between October-March.
It's a lot of the same stuff/different day after a while.
Granted, the cost of living isn't very high, it's rarely cold (but often hot/humid/windy), nothing is too far from you anywhere in the city. You live on the coast and the spring/summers rock. People are pretty casual, not at all like the Austin/Dallas crowd.
Me, personally, for the right job would move back (i live in SA now)...but I'm from there and know people there.
So, take that for what it's worth.