Ali,
Yes, pro's will charge either a 'Day Rate' or a 'Half-Day Rate'. Being that your potential gig is at night, be prepared to pay a full day rate. Depending on where you are (if in the US) for a 1-2 man team you should expect between $500-$1,000 for the shoot. Price depends on what format you want shot (SD or HD), the gear needed for the shoot and the reputation of who you hired. If extra camera people are needed for better coverage that will factor in as well. Also, if you want the footage edited that's an additional cost.
If you're wanting good work done, try to avoid 'going the cheapo route' and getting some college kid to do it for next to nothing or free. They might do a good job, but don't count on it. No matter who you get, ask to see their 'Demo Reel' first. You audition singers, dancers and DJ's, so you must with your shooter(s). There are camera people who specialize in club work, but an experienced pro with a well rounded background will be familiar enough with lighting and sound to do a good job.
Don't go with the first one that tickles your fancy. Look at the reel and ask others they've produced for about their experience working with the cinematographer / videographer. When you find someone who does good work for you in a timely and professional manner, pay them.