Los Angeles-based Three Day Rule, the Los Angeles startup which is looking to reinvent dating through a subscription, invite-only service, told its users today that it is getting set to launch in New York City and San Francisco in coming months. The company did not provide exact dates and details, but did say it had begun signing up potential members in those cities. Three Day Rule is headed by Val Brennan and Talia Goldstein, and is targeting career-oriented professionals looking for participating in personalized, hand-picked exclusive events to meet other like-minded singles.