That's rough man. I have developed a method that has worked within 5 minutes multiple times in the last month. I am a bit older so that may also be why it is easier for me. But I start by scoping out peeps that pull in at around the same time as me. Scan for the headiest dudes or friendly old guys. I try to be assertive and friendly. I will ask, Are you buying a ticket? Then explain to them that I have a 2 for 1 but I am by myself and I need someone to  use it with. If that fails then wait at the ticket window right when some guy asks for a single ticket and reaches for his wallet, enticingly pull your 2 for 1 out and be like "Hold up I have a 2 for 1 but I need someone to use it with!" When I did that it was some weird jacked dude with a shitty attitude and it still worked. I have met more random ass people with Killington 2 for 1 it's amazing.