Which of these two hotels in bangkok would you recommend? Adelphi Grande or the FuramaXclusive Sukhumvit ?

FuramaXclusive is right across the street from 'Soi Cowboy' which has many bars. Honestly though, the bar areas in BKK are many for and cater to men; if you are going just for the experience enjoy. By the way, I would not stay at either of the hotels you listed. Stay at the S15 it is right on Sukhumvit and a two minute walk to the Sky train (the only way to get around BKK).