Policy

When you work at venue it's really important to have a consistent door policy.
If you know it's spit and sawdust and upright is about the only criterion for getting in, you'll need to have a numerous heavy team possibly light on the conversation.
If you're keeping out the chav's and going for an older better dressed audience you'll need less staff, more communication and conflict resolution skills.
If you stick to young ones you need staff who keep their eyes and ears open but don't dismantle everything in sight.
Whatever your policy choice, you tailor the numbers, skills and team approach to it. If you want to chop and change policy night by night and week by week expect a team that doesn't match the venue and more importantly you'll have numbers that don't match. Too many staff and you'll get teams cut back when you'll be needing them all when it kicks off next week. Too few staff and you'll get your arses handed to you on a plate.
I don't like that happening. There's only so many folks you can hold back while pinning a coked up 'roider brute in the fire exit. Then you see that every member of the team's doing the same. and there's still half a dozen coming on. Not a good night but one to remember.