its my understanding that each of the forums designated for mental disorders is for discussing that mental disorder or that grouping of mental disorders.

for general conversations like social, jokes and neutral discussions goes in...

General Social Chat - Forums at Psych Central which is divided up into a general area, coffehouse, pets, books, movies tv

there is also social groups where members have started their own social groups on things they want to discuss...
http://forums.psychcentral.com/groups/

there is also a creative forum where members can create and post their own poems and stories Creative Corner - Forums at Psych Central

there is also a place where members can take a break from discussing mental illness by playing games.. Games - Forums at Psych Central

and also an area for members to take a break from discussing mental disorder problems by posting music and the like Videos, Lyrics and Podcasts - Forums at Psych Central

my point there are many places here on psych central that I visit when I want to take a break from talking about mental illness problems.

heres a suggestion if there isnt a social group for joke telling maybe you can start one.