San Antonio suggestions

What part of town? Or does it matter?

Eta:

Riverwalk - Acenar (Urban Mexican - Next to Hotel Valencia)

King William District - Rosario (Mexican)

Close to downtown - Little Red Barn (so-so place to get a steak, neat atmosphere - waitresses wear holsters and pearl handled revolvers.)

Hwy 281 @ the Quarry Market - Paesanos (Italian)& chains like PF Changs & J. Alexander's

Blanco and 1604 - Longhorn Cafe (Burgers)
Also on 1604 around 281 and Stone Oak Pky = Stone Werks / Silo (also by the airport) / Houlihan's / Copa Wine Bar / Reggiano's - and some other good places

Fiesta TX (I-10) - County Line BBQ / Pappacito's (Tex Mex)

Lots of chains all over San Antonio
I don't know about the south side.

I was over there the other day. We ate at Fogo de Chao. Very good but also expensive as it's one of the Brazilian steakhouses. Assuming you'll be going to the Riverwalk, there are tons of restaurants over there (including Fogo de Chao). Boudro's is really good. Theres also lots of bars on the RW, like Martini Bars, pubs, there's a Hard Rock Cafe, etc. You'll find something

Silo
Biga On the Banks
Liberty Bar
The Monterey
Jerusalem Grill
Mina and Dimi's
Guajillo's