Since you're only going once a week, I don't think it will be that damaging. Now they're telling us to go outside without sunscreen for ten minutes a day to get our daily dose of vitamin D.
However you had better check with your salon to see if you can use any oils. My salon does not allow it, as the oil is really difficult to got off the bed. They have to use acetone, which can ruin the plexiglass that you lay on.