when i was living in dallas, i could always be found at Moosh, now closed and reopened as something else and haven't been there since, but it was in Lower Greenville...
other cool places i liked going to are:
Samba Room (awesome mojitos)
Cuba Libra (mojitos by the pitcher, located on Knox Henderson)
Old Monk (across the street from Cuba Libre, good beer and drinks)
Tei Tei (awesome sake, get Chiku Bai cold, also on Knox Henderson)
Blue Fish (happy hr all day on thursday, $1 sake by the bottle, bout 3.5 shots per bottle, located in Lower Greenville)
those were pretty much my favorite places...
Guidelive also has a lot of good info