This won't be the cheapest option for you in Bangkok. There are certainly those littered on Khao San Road. But this is probably one of the cozier options. The rooms are clean and big enough. The downsides are the shared bathroom and some rooms don't have a window.

The staff are super friendly.

We've been here numerous times and have tried other hostels in Bangkok, but often come back here.

Also, Silom has some tasty food options - lots of Japanese food, good Thai food stalls/food courts. It is also just a 5-10 minute walk to either the BTS or MRT.

If ou’re coming to Bangkok on a hostel budget, I really cannot recommend The Urban Age enough. Yes, it’s Lonely Planet listed, so you’ll have to reserve a week or two in advance if you want a private en suite room, or even a dorm at some times - but the Silom location features a neat mix of farangs and locals, it’s right near the super-convenient Sky Train. The rooms are clean and well-appointed, the building is surprisingly quiet (for being behind seedy Patpong, although the soi itself feels perfectly safe), and the staff have been nothing but gracious and kind. One woman at the desk in particular has been a total sweetheart - I had an issue with a lost credit card and she immediately helped me find a sim card so I could call and get it sorted! I like it so much here I’ve booked for tonight and tomorrow (stayed here all last week, just returned) and for when I return again after Cambodia. It’s splendid!

The urban age is located in the centre of Bangkok just off Silom Road. The location is excellent for everything as there are transport links close and markets and plenty of places to eat.
By far the best thing about this hostel is the great service the staff provide. All 3 staff members we met were really friendly and helpful especially when we had a couple of misfortunes on our trip like losing documents and our phone.
Rooms were simple but comfortable although the mattresses were pretty tough. Overall this is a great hostel for a Bangkok stop over.