No doubt bars or clubs are the very place where offer a dense population of single females in a small amount of space, which means they are the easiest place to find girls and then pick them up. However, you should get over some things that are working against you.
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without reading whatever your tips are, i can safely say that there are NO easy tips to pick women up from bars/club etc.

its all down to whoever that person is and what she is seeking that day/night.
one day you could pick her up by saying "lets go somewhere else more private" while on another day you wouldnt even get her attention.

the minute ANYONE believe that they have figure women out is the minute they have lost the plot.
women comes in different shape, forms and mind so what makes one get excited about you today might not be what the next one need/desire.
always have an open mind. . . . . . . ALWAYS!