Drums on special occasions are an evil
Question

                What is the ruling on responding to an invitation (to parties where there will be) some evils such as race horses and drums, knowing that the one who is issuing the invitation is a relative, but the occasion involves these evils?
Praise be to Allah. 
          It is not permissible to accept such 
          invitation whens these evils will be practiced openly. The same applies 
          if alcohol will be drunk openly or cigarettes will be smoked, or promiscuous 
          movies will be shown, or there will be free mixing between men and women, 
          or there will be wantons displays of beauty (tabarruj) and no hijaab. 
          But if you are able to remove or reduce the evil, or if you attend they 
          will respect you and will not do these evil things, then you should 
          attend for that purpose. Otherwise, do not go there, even if they are 
          your relatives, except on the condition that you can remove the evil.