Chateau de Bangkok is in a good location...close to Lumpini and not so far from Ploenchit BTS. I only know of families who have stayed there, but being a serviced apartment, I don't imagine it's gay unfriendly. It's the same company that owns/runs a tower in my condo complex and here it's not gay unfriendly at all....just a typical Thai live-and-let-live pleasant place to stay. But others may have alternative views maybe.....