Double date? Meaning two people on the date? Too much distraction, you may not learn that much about the person you're on the date with..and may not interact much.<br />
Double date as in dating two people? Too much confusion. You don't really get to know about either person..plus there's the whole "lacking loyalty and respect for their time" thing.
Oh, well..good luck. Personally, I'd prefer one on one..I'm not good in groups..but you may be more vibrant in groups..dunno.