Meetings allow the team and the manager to avoid many mistakes. for one standard project, how many meetings do you usually shedule per month?

Meeting over a cup of tea on daily basis or at LUNCH will be more beneficial.

The number of meetings vary project to project and its stage of completion.

I schedule one project meeting per week. But communicating project status is a daily task.

at least once every working day

26+

Meetings should not be for routine & procedural communication or feedbacks for the project as there is a Communication Plan for the same which is to be followed. Such meetings result in waste of productive time and affects the work-life balance of team.

Meetings should be for major issues like change in project plan, team motivation, team performance appraisal, risk response strategies, quality issues, vendor negotiation etc.

The number  of such meetings may vary accross projects but in my opinion it should not exceed8 man-hours each month.    

well as a manager i have daily meetings with my team leaders once early morning to check our daily plan and one30 minutes before finishing the working time to check what we gained according to plan,i prefer these meetings very short and brief and seriously try to motivate the team leaders to take part in them by very short reports and explanations,in case of managerical meetings i prefer them weekly and in case of overall progress check i prefer that biweekly and sure a monthly stearing comeetee meeting.

Meetings, as and when require, however I feel that keeping your teem in the loop is more important than lots of meeting. A walk around the site(s) / project(s) with yout team(s) once or twice a week seeing and discussing the problems as they are pointed out is far better than sitting around a table and discussing the problems remotely. I.e. Walk the talk and come up with the answers collectily on the spot.

I would rather think about conducting the meeting in the milestones of the projects rather than fixed period of time.

you can also have a reporting by exception. which mean if things were out of the plan or there is an emerging risk, then an immediate meeting should be held

I did prefer to have weekly formal meeting and clubbing all the interaction on a daily basis whatever I used to have with my team daily in the beginning of the day and at the end of the day. 

daily meeting with supervisors.

one meeting for each phase of project for evaluation.