Hop in a cab for a ten minute ride over to the area of King street a few blocks west of Yonge (near Peter Street). Loads of bars/restaurants/entertainment venues in that area. Fun, lively, current, but generally not "x-rated". The Harbour Castle is a fine hotel, but just a tad far to walk to some of the nightlife areas....although its perfectly safe and theoretically do-able. The place suggested by the previous poster would also be in the same general area. If memory serves, Wellington runs paralel to King.