So a girl I knew for the past year broke up with her bf and I've gotten with her.

However I did not manage to escalate to sex, she seems to be insisting on a date first. (she was one of my flatmates last year and knows I've had plates but not a girlfriend so I assume she wants to test if I'm gonna keep her around only as a plate).

Anyway what do you think I should do; go for drinks in a bar or a dinner? I don't want it to look like a legit date so drinks seem to be a preferable option.

The goal is to keep her as a plate rather than girlfriend.