The best day to go to Pandoras is on a Tuesday or Wednesday, especially if their Instagram feed has a good lineup.
I think it's worth going for extras in the LDA if I see the following:
Martina - Beautiful Russian that won't break the bank.
Monse - Tried and true classic Mexican pleaser.
Luna - Beautiful, tall Mexican milf.
Mandy - A beautiful woman who is a very fun time.
I would recommend going in the 1pm-3pm range rather than the 11am-1pm range, as usually the line up is a bit better.
Always communicate what you're looking for and don't take life too seriously.