What is the proper thing to do when invited to a simcha in a conservative synagogue.
Bat Mitzva where the bat mitzva is due to read the parsha ?
This is a delicate question, and the answer depends on the particular circumstances of the case.
Although it is better to avoid going, if there are extenuating circumstances that require your attendance, it can be permitted to attend.
Of course, if you are a rabbi or central figure in the community, the answer might change, and each circumstance must be weighed up individually.