As CW stated All stars on harrow road open every evening. You can get the 18 bus from Paddington stops right outside the gym if you don't drive does Saturday & Sunday am sessions as well great place to train.
Or Ringtone in Euston Square is only a couple of stops round on the circle and district line. Small, but very friendly place to train.
yeah id say allstars they cater for everyone boxers and keep fitters i would of said dale youth if you was moving to the area but all stars is your best bet.
Suddy it is a basic old school gym.Ring,bags warm up cycles & free weight's & mats. Not expensive to train at a converted church a guy called Mr Akay runs it you will enjoy it there.:good
you can take the bakerloo line from paddington to waterloo and transfer to the jubilee line to canning town and then walk 7 minutes to pea**** or tko gym