If your going to get flashlights for a club dont go cheap, they will take a beating. I work security in a club that caters to the 18+ crowd. One of the things I have noticed about young people aged 18 to 21 is when they fight they generally prefer to fight on the ground where the light (even if in a pocket or holster) can take quite a beating. Get something with a good warranty like Pelican, Streamlight or Surefire. If your giving these lights to bartenders you may want to go with a light that uses 2x 123 lithium cells for their extended battery life. I highly dought bartenders and porters will remember to change out batteries until they need the light and the batteries are dead. If you look around Surefire G2's can be found for roughly $30 each with an extra set of batteries included. If you buy 10 or more you may get an even better price. There are places where you can buy CR 123 primary cells for $1 a piece. Get a box of 50 cells and you will be set for a few years depending on how much you use the lights. Getting a light that uses an LED bulb would also be a good idea for security, you dont want to have to worry about the bulb burning out or getting broken if it gets dropped. Dont go cheap, you will end up spending more replacing broken lights than you will on one good one, clubs make thousands of dollars a night, they can afford to spend a few hundred on 10 flashlights. Remember this, to security a flashlight can save your life, especially when the power goes out.
I am in the same boat as you, I just hired 4 new guys for my security crew and need to get them so new lights since we are not allowed to carry anything bigger than a 2 D cell light as someone may consider is to be a weapon. Right now the Surefire G2Led and the Pelican PM6 3330 are at the top of my list.