Presumably your club has a set of rules, and presumably one of those rules says that any member who persistently acts in a manner that is likely to bring the club into disrepute, or whose behaviour is detrimental to the atmosphere enjoyed by other members may be liable to have his/her membership withdrawn by the committee.
You need to be aware that a committee cannot simply expel a member from a membership club because it fancies doing so - the rules set out in the club's constitution have to be meticulously followed. If you don't do that, you may find yourself facing legal action for the member to be reinstated, and if your club's rules did not contain a clause like the one I mentioned above, or you did not allow the person concerned an opportunity to state his or her side of the picture to the committee, the action would almost certainly succeed.
Normally an expulsion would not take place unless the member concerned has received at least two previous written warnings, accompanied by whatever evidence of misconduct is available. It's important to remember that the decision to expel someone must be a fair one - there must be no hint that the people who took the decision were in any way personally prejudiced - by being involved in a personal dispute with the member concerned, for instance.
Generally, unless the misconduct was very serious, or was repeated many times, it is normal to start by suspending the person's membership for a period, rather than moving straight to expulsion. Suspension can be accompanied by a written notification to the effect that once the member has been allowed back to the club, any repetition of the misconduct would result in immediate expulsion without further warning.