SITGES
Roughly pronounced "seat-jazz", is the plural form of "silo" (as in silo for grain), in Catalan -the local language. Yet it refers to ancient silos (the ones in Roman times: https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Ullastret_sitges.JPG/220px-Ullastret_sitges.JPG) not the modern ones you find across the US Midwest, LOL!
Get your bearings
This is the map of Sitges: https://thescoopofmarsu.files.wordpress.com/2010/09/planol_sitges.jpg The area with the rectangle is considered "central Sitges". You can see the station on the northern edge, above nbr 50. The centre of town is Plaça Cap de la Vila (Catalan for, literally, "centre of the town"), located right of number 48. The streets in yellow conform the old town, with its narrow streets and back-alleys, where many sitgetans (residents of Sitges) go about their daily life: restaurants, shops, schools, etc. The area left of Avinguda de Sofia (near nbr 12) until Terramar, by the golf course it's called El Vinyet, in honour of the Virgin of Vinyet, and there's a small very cute chapel there, el Santuari del Vinyet. This is mostly a residential area. To have an idea of distances, from Cap de la Vila (centre of town) to the most left part of Sitges at Terramar (nbr 11), there is 3km. Tip: it's a very pleasant 1h walk, especially by the promenade (nicknamed "el passeig", the boulevard) by the seafront.
Beaches
The beaches of Platja de la Ribera, La Bassa Rodona, La Fragata and Sant Sebastià are the closest to the centre and those to which most people go, therefore also the busiest. Traditionally, La Fragata was the most "prudish" -attended especially by those with more 'conservative' views, so little topless and no nudity there. The rest are normal beaches. The nudist beaches are the Platja de l'Home Mort, located 3km away, after the Golf course to the left of the map, and also at the small cove to the left of Platja Sant Sebastià (the one in white between numbers 10 and 39 in the map). As per the gay beach, that'd be the right side of La Bassa Rodona beach, next to the pier separating this beach and La Ribera beach. Yet this is just another normal area that happens to concentrate a lot of gay people in that area -just that!
For detailed info on services for each beach: http://www.sitges.cat/jsp/platges/ribera.jsp It also includes info on the state of the sea (currents, jellyfish...) A green flag means everything is all right. Yellow means precaution and red means avoid bathing (ie sea currents).
Loungers are nicknamed "gandules" in Catalan, pronounced "gan-doo-lass" (gandul = lazy). They are inexpensive, under 10€ (for the whole day). Prices might vary in different stretches of the beach, as there are different "companies", but they're all pretty much the same. Do remember not to leave your stuff unattended when one of you is going for a swim. Beaches are quite crowded and unfortunately, petty thieves take advantage of that.
... but Sitges is much more
Actually, the beaches in Sitges -while cosy- are probably not the highlight of the town, strolling the narrow streets (http://infocatalonia.eu/w/ibDWG), relaxing having a drink and a snack and visiting some of its museums (http://museusdesitges.cat/en) is... as well as seeing one of its annual events.
