I ask:
Do you know a room where I can sarge 50 HB10's in two hours and not have any of them suspect I am sarging the rest?
Answer: my room (or yours or anyones that has a computer and internet connection)

Online sarging is the most efficient sarging if done right with the end in mind.
If you post a good (and at least somewhat accurate profile) and subscribe to one of the many online sites - you have a field of woman waiting to be contacted - in fact they have paid money (to the same site) to let you know they want to meet a man.
The issue is... what will you do when you # close and set up a meeting.

Key is to get out for a meeting ASAP (after some small interesting trust building chit chat). In place of the two meeting close (number close followed by date) - you number close online and go out for the first time on your second date (online chat was your first).
Now... the usual PUA moves...
but... quite time efficient in sarging all of those tens (just make sure you join a good site).
-nebu