Hi Midge,
You should get in touch with your local Licensing Authority and ask to see a copy of the current licence for the premises. This should give you a series of pieces of date related to Licensing hours and for what activities the licence has been granted for, which may be live music, recorded music, dancing and other activities and the specific hours for each. Usually they also include a condition which means that what they do must have the approval of the environmental department.
The best bet is to ring up the local authority and ask to be put through to licensing. Another useful tip is that often your local police will have their own licensing officer who keeps an eye on applications from a police point of view and the person doing the job can be a useful ally.
Here are the guidelines for our local authority - I suspect yours will have soething similar:
http://www.southbucks...3_a_simple_guide.aspx
Hope this helps!