Ok so on a few occasions there I am chatting to girls, building attraction and rapport after throwing an FTC, then when I should be closing I'm thinking 'wow a timebridge would really be handy right about now' but since me and my friends don't usually go out that much and never have anything big planned I don't have a time bridge to use. Should I just make one up to get the number and then cancel it later? This is a pretty big sticking point for me at the moment.

why you dont want to be with a girl you are talking with? i mean whats the purpose of a " time bridge " ? only go to other place when:

1.- you dont like the girl
2- girl doesnt likes you
3.- you like her but you got bored and just wanna go.

if you get bored and your friends are not around just say hey im going home right now see u later and go play a game or watch a movie in your home, make popcorn and get relaxed, do "time bridges" is just so stupid and coward if you run out of things to say just say that !! "i ran out of things to say today im going home im tired ill call you tomorrow" something like that

But if she's with her friends I can't expect her to leave them for an instant date so I need a time bridge so I can have an 'excuse' to get her number.

So you're saying I should just be like...
'Well I've gotta meet my friends now but you seem really friendly, we should hang out sometime, here put your digits in here '

Anything better than that I can do since I never have a real timebridge I can use?