Siren, once monthly, grew so popular with its audience that the event now makes each Saturday a girls' night out. Miami's most metrosexual hangout does the women-who-like-women thing well -- clubs do not give up a Saturday night easily. That means more women in the upstairs lounge grooving to house music, salsa, and all things jiggy. Though Jade is not exclusively for women, Siren is, and it clearly makes the distaff crowd happy, merry, joyful, gay even. Like the women who have popularized Jade Saturdays, the club itself is hardly trashy, so closet the flannels and break out the lipstick, ladies.