Yes, a Jewish person can attend a concert at a church. Churches often host concerts that are open to the public and are not necessarily religious in nature.
There are a few things a Jewish person might consider:
* Nature of the concert: If the concert is explicitly religious in nature (e.g., a Christian worship service with music), a Jewish person might feel uncomfortable, depending on their personal beliefs and level of observance. However, even in this case, attendance is permissible.
* Personal Comfort: Ultimately, the decision to attend is a personal one based on individual comfort levels and beliefs.
In general, attending a concert at a church is a common and accepted activity, regardless of religious affiliation.