Can tennis be played on racket course?

Answer 1

Not really, since the short handled, dead surfaced paddle will not allow you to use the full court. Try to find a paddle tennis court or, better yet, save your pennies and go on a cruise where the ships often have "deck" or paddle tennis available.

Answer 2

No, it cannot.
For various reason, primarily safety. Tennis rackets are too large for the small court, and significantly less structurally sound than Racquetball racquets for the surfaces they may be hitting at full speed (primarily concrete walls).