BOC and RCC relations?

[DanielM]

There is either that or see if there is a Byzantine Church around. The Gregory and John Chrysostom liturgies are both derived from the St James liturgy we use, so it would not be as different as attending a Catholic Mass.

Also, the Sermon there would be from an Orthodox perspective, so less chance of crossed wires.

If that isn't possible I would say that any Liturgical Church service is fine, just make sure that you are keeping with study of the Faith and doing personal prayer.