Take trolley to border.  No need for a taxi, unless going very late at night.  Use Libre taxi and negotiate a price lower than $5.  Go to Tropical Club, diagonally across the street from Adelitas.  Ask for Susana--the best in TJ.  With any other girl, always negotiate a lower price, which is easy to do.  Bars on Revolucion are a waste of time.  No need to get a hotel room (although there is a previous thread of advice about this issue on this site).  Have fun.