How do you end a conversation with someone you just met at a..

-bar -club -mall -work -street -part -bbq

once it has...

-ended in her not being interested -ended in her being interested in a date -ended in her following you home -ended in her giving you her number -ended in you giving her your number

with the weird kicker that the two of you may still be hanging around in the same location for x amount of time, eating, drinking, hanging out, working with other people & friends?

or

with the possibility of you moving on to talk to somebody else. Do you ignore her regardless of you being successful or not?