I haven’t posted on this site for a very long time, but I just noticed this thread and thought I’d contribute. I’m a practicing Mormon. I have been to Catholic Mass twice and found it very beautiful and spiritual both times. I probably would not invite a Catholic friend to go to church with me, because – as so many of the comments on this forum have indicated – I’m sure there would be a great deal of suspicion as to my “ulterior motive.” That’s unfortunate. I think that we could all benefit by experiencing the ways in which other people worship. We can either focus on our differences and continue to grow more and more suspicious of one another over time or we can look for common ground (I can assure you, it does exist) and become more the kind of people our Savior would want us to be.
Several years ago, an LDS congregation and a Catholic congregation that were just about next door to each other had a joint service. It wasn’t a Mass and it wasn’t a Sacrament Meeting. It was less formal than either of those. The service began at the LDS Church. Members of both churches sat together in the pews. The invocation was offered by a Mormon, and the benediction by a Catholic. One member of each congregation who had provided a lot of service for the community was publicly honored. Afterwards, everyone went next door to the Catholic Church. This took place in the evening, after dark. Boys from the LDS Scout Troop stood along the sidewalk shining flashlights so that people could see where they were going. Once at the Catholic Church, everyone again sat down together and enjoyed a performance by a choir comprised of people of both faiths. They sang together, a number of numbers from each religion tradition, none of them containing lyrics that either group of people could possibly find objectionable. As I sat there, tears came to my eyes and I thought how pleased and happy our Father in Heaven must have been at that moment, to see His children gathered together in His name. After the choir performance, we went into the Catholic Church’s social hall for refreshments. It was truly a memorable evening.