Admit it: This time of year, you wanna play dress up. But how do you celebrate Halloween after you've outgrown the annual quest for candy? You use the holiday as an excuse to get sexy, and that's exactly what the adults-only Nauti-Night Costume Party at the Florida Aquarium is all about. In addition to live entertainment, free food and an open bar, the ninth annual event features a $1,000 prize for most original costume. But take my advice: While you could go with the usual witch or vampire getup, I recommend that you take full advantage of the themed event's risqué double entendre and arrive as a tempting mermaid or perhaps a hunky King Neptune wielding his mighty trident. Fri., Oct. 27, 8 p.m.-midnight, 701 Channelside Drive, Tampa, $70 in advance/$75 at the door ($65 members), 21 and up only, 813-273-4568, www.flaquarium.org.