/ Visiting Sopot for a week in late May/start of June looking for restaurants/pubs
The best way to travel from Sopot to Gdańsk is by train, they are very, very punctual, about 1 every 5mins, they are quite cheap & go to the centre of gdańsk (Gdańsk główny)
I enjoy Sfinxs restaurant on długa street, & there is a also very classy restaurant called McDonalds which is tasty hehe!!
Take a tour of the Motława river which goes through the shipyards all the way to westerplatte. Go to the Amber & torture museum. Visit the solidarność museum.
As for beaches, seeing as your staying in Sopot, when you are at the pier you can go to the left of it & outside of the Grand hotel that part of the beach is quite busy & lively, if you go to the right of the pier then its a little more less busy.
If you have the money go to the new Shreidan Hotel Spa, its absoultly brilliant!!!
Also, you must visit Aqua park in Sopot.
Have fun ;)