@Trader Vic's has a very nice theme to it. Its island themed and I think and the food is Polynesian. They have amazing cocktails, that come in cool jugs, try the tiki pukapuka its my favorite

Where can I find a romantic wintry restaurant suitable for a birthday dinner?

@Trader Vic's is indeed a nice suggestion!! I like their food and atmosphere, good choice

Where can I find a pub with really good desserts?

I love the desserts they have @Trader Vic's, if you go there you must order the chocolate macademia nut tart. I also love the pana cotta they have @Living Room Loft as well as they creme brule which is just amazing!

Where can I find the best place to celebrate my birthday?

If you want to party and you like arabic music you can go to @Pi Lounge & Bar it always gets crazy there, another great option is @Trader Vic's .. they play great Latin music and have amazing food.But if you are not big on the dancing you can always head to @La Maison Verte for a nice proper dinner celebration

Where can I eat the best shrimp?

@Trader Vic's has the best shrimp pad thai !! They serve other great dishes with shrimp but this one is is my absolute favorite

Where can I find a restaurant with a great atmosphere?

That is a hard questions because it depends on what vibe you are going for, what food you want and sometimes what area. But I like @Blue Fig they usually have live music and a chill atmosphere. Sometimes I like to go to @Little Italy especially when you can sit outside. It you are looking to drink, dance and be around good people then I like to go to @Trader Vic's