Not sure if I can be of much help but when I was in SD, the locals used to tell me that there were alot of people out Monday nights because they were still partying from the weekend. Not sure exactly where though...but if you do a search under the Boca Chica link (I'm sure you can find it on this board, I always see it appear under some thread) and go to nightlife in SD, that may help you.
A little off topic but, I was following your link about you working down there at Price Waterhouse, just curious to find out how it's going?