Willravel

...Shout at each other and pretend we can hear each other, for one. Going to a club is about one of several things, which depend on what you want to get out of your experience. Are you thinking you just want to go and dance with your friends? You might want to stick around them all night and just do limited dancing with guys that they give you the 'okay' for. Do you want to go find a nice guy? You might do better doing that elsewhere, but if you're determined, who knows? Put yourself out there. Guys will talk to you, of that I have no doubt. When they do, engage in a limited fashion. Make him answer questions and talk about himself, don't just talk about yourself. If you want some ass...well that's kinda dangerous.

You might consider sticking with friends who have more experience at clubs.
You can! I mean pace yourself, but that's what the bar is there for.
Guys usually move in small packs, and women move in larger heards. Ever seen the discovery channel special on loins hunding zebras? The loins move in small packs so that there is enough food to go around. Also, large groups tend to scare the zebras away. On the other side, zebras move in large groups because there is safety in numbers.
Depends on the club. Some clubs are still not ruined by 17 year old girls, and those are the rare, diamonds in the rough.
Bottled water. Dancing in a hot club can leave you dehydrated, and drinking alcohol doesn't help. I would sugggest that you have no more than 1 drink per hour, and try to drink as much bottled water (keep the cap on unless you're drinking it) as you can.