I would highly recommend the S33 Hotel in Sukhumvit Soi 33 - it’s a great location & there’s many massage parlours within a 30 second walk. Importantly, it’s a guest friendly hotel, meaning if you wanted to take a girl back for the night, there’d be no issues - reception will take her ID card on arrival which gives you safety as well. On a personal note, I would highly recommend 7 Heaven which is a cracking BJ bar - I truly hope you enjoy your trip to Bangkok!