There was a year straight where every weekend, I went to at least one bar mitzvah or bat mitzvah, and we would all go, and it was a lot of fun. We sneak some beer; we'd hang out; we would try to get with girls and not. And usually we'd just end up hanging out together alone.
I am terminally sentimental about graduations. They are more individual than weddings, more conscious than christenings, or bar mitzvahs or bat mitzvahs. They are almost as much a step into the unknown as funerals-though I assure you, there is life after graduation.
When I am at home, I never go near the synagogue unless, say, there is a bar or bat mitzvah involving the children of friends. But when I am traveling, in a country where Jewish life is scarce or endangered, I often make a visit to the shul.