Take a look at the reviews on tripadvisor - have recently been to this resort.

http://www.tripadvisor.com/ShowUserReviews-g189449-d317622-r5503303-Sun_Beach_Resort_Complex-Rhodes_Dodecanese.html

My review is dated 24th July

I stayed at the Ixian grand, which is between trianda and ixia, trianda is nicer than ixia as ixia is based on a main room,

Theres a few bars in trianda and some good resturants, its worth going down to Rhodes Town and old town, good at night however the drinks are pricey..

have fun!!

Don't know your hotel but you'll find a good choice of restaurants and bars in Trianda. Nightlife is quite low key really, plenty of bars but a bit more subdued than Rhodes Town. If you fancy a livelier night get a taxi to Orfandinou St, the main Bar Street in Rhodes Town.