Latin rite Roman Catholics can receive the Eucharist, if properly disposed, at Byzantine Catholic churches, such as the Ukrainian Catholic Church and the Ruthenian Catholic Church.  You may need a little instruction on the proper reception (kissing the chalice, receiving the combined species of the Eucharist on a spoon).
As regards to altar rails, I visited my family's ancestral hometown in Europe and went to the oldest church building, supposedly in use from the 12th century.  There was no altar rail  and their were no pews; it was quite primitive and obviously quite different from the cathedrals of Europe..