Up until the early 1950's it was common for skaters to compete both in singles and pairs, though they usually only did really well in one discipline. Maribel Vinson [Owen] did both as well, before her marriage. (She and both her daughters died in the 1961 Sabena air crash. Her daughters were the 1961 US champions in ladies singles (Laurence, age 16), and the silver medalist in pairs (Maribel Jr., age 20, with partner Dudley Richards, who was also killed in the crash). Maribel Sr. coached nearly half the team that year; most of the members who skated out of Boston.
In the 50's and early 60's major competitions in the US were sometimes indoors and sometimes outdoors; it depended on what club was hosting. At the time you had to be prepared for either type of surface, just in case. The first Zamboni machines were sold in 1950, but there were only 4 of them then; they didn't come down in price far enough to get really popular until the early 60's.
Incidentally, the US ladies' bronze medalist that year, Rhode Lee Michelson (who also was killed in the Sabena crash) did a free skate that was much more modern in style:
At the time, she was chided by some critics for being "too athletic", and she also reportedly was a bit weak in the school figures. I often wonder if she might have changed the style of US ladies' skating much sooner had she lived.