La Mar Beach Club in Puerto Rico is near to the Spar supermarket by Puerto Rico beach. It was previously a public swimming pool know as the ‘Lido' or ‘public pool' but underwent a major renovation in 2012 and now sports a trendier look.
If you want to have a relaxing day in Puerto Rico this is the place with an inviting swimming pool, champagne, chill out music and cocktails. There are various sunbeds and lounge options including balinese beds and single loungers. The cheapest sunloungers are 8€ each on weekdays or 10€ on weekends including a parasol and towel, plus access to the swimming pool. (Prices may change since writing)
If you only wish you enjoy the view and a cool drink or dinner, you can visit the restaurant area of the beach club, which is free entrance.