Well, I am here at a very trendy cafe/stylish cafe in the city.
例えば、
オシャレなカフェを英語でー
'The cafe of the moment.'
'A really stylish cafe.'
'This is a cafe in vogue at the moment.'
'This cafe is prestigious and acclaimed (in Tokyo).'
このモールで私が知っているおしゃれな店に行かないーI know a very trendy shop at this mall, would you like to come with me?
以上はおしゃれに関する表現になりますが、どうぞご参考までに。