I think shes asking about boat parties, not actual taxi's but i may be wrong...
My friends and I went on a night out called judgemnt sunday, which takes you from San Antonio bay to San An itself, it does go past it slightly, and turns around giving you enough time to see the sunset (it sort of spins by sunset strip) so you get to see the sunset on both sides, it then docks in San an, giving you the oppurtinty to go round the bars in San An, if you stick to the bars recomended as apart of the package with the boat trip, you get offers on drinks, and they take you to the better bars and such.