Here's an opener I came up with on the fly at the bar.... Works like a charm but

YOU MUST HAVE A WING!

yes it must be used on at least two hb's

As they are walking your way make solid eye contact and make sure one is paying attention to what your about to do:
*Do this like your trying to be discreet*
-direct your wings attention to the Hb's with a nudge, head nod, and point them out to him
-say this as your doing the above, just loud enough so that they can hear -- "those are the two I was telling you about, those two right there"
-When they start to approach just finish the above with "those are the two hottest girls in the bar"
-Go from there, but make sure you and your wing keep it short, exit first, and leave the door open

This one works extremely well, curiosity pulls them in instantly and 99.99% of the time they are fun, single,flirty, and you got them to approach you and your wing

If you can nail the tone of your voice, and execution it's a home run