Availability Calendar – 3 time slots

Hi, I’m looking for a plug in for a community centre to show a calendar for bookings. There is 1 venue, it can be booked for the morning, the afternoon, the evening, or all day. I’m looking for a very simple calendar to show this information. It does not need to take bookings, just show each day with the 3 timelsots, and if they are booked or available.

Could anyone make a suggestion for a free plug in, or one which does not cost much. The admin for the hall would keep the back end up to date.

The website isn’t on wordpress at the moment, I’m trying to convince them to switch but I need to provide a solution to the calendar first.

Many Thanks