I am high church Episcopalian. When I was very ill, I telephoned St. Patrick's Cathedral in NY to see if I could attend their healing service. The worst thing an Episcopalian could do is refuse communion to anyone. It is between God and the individual. I was told emphatically I was not welcome. Only Catholics in good standing. Around the same time, a man dying from AIDS wanted to marry. He was bisexual. The diocese refused to marry him.
I discussed the situation with the writer of A Wrinkle in Time, Madeleine L'Engle, a regular at the Episcopal Cathedral. She was the writer in residence. Her advice was that she frequently preaches in Catholic churches and, b/c of her view of Eucharist, always partakes. No priest has ever said anything to her. She said I made the mistake of affirmatively requesting Eucharist. She just goes and partakes. I could be a mole for the diocese and ensnare the priest.
When I worshipped at the Cathedral, Jesuit priests consecrated the E. Eucharist and received it. I believe it depends on the local priest. YOu should not take it if you don't want it. I always go up alone for Eucharist with massive amounts of people - thousands upon thousands. I live in a much less cosmpolitan place now and decided to partake in a local Catholic church. My nephew almost had a stroke from the horror. I was so uncomfortable I would not do it again here.
I've had Roman Catholic priests strongly encourage me. On the other hand, some of the "nos" were so emphatic. I believe they would physically restrain me if I persisted.