I was there on a Wedenesday evening, ±30 people there of ages 25-45. There was a foam party that evening in a small area of the sauna (normaly steamroom?), but limited action in there. In general not to big place and like all places it depends on the people who are there. Sauna facilities are a bit worn (1 jacuzi, 1 sauna, 1 steamroom, showers). The cruising was ok, although the private rooms are small and didn´t look that clean. The relax area was cold... Left with a bit of mixed feelings to return sometime or never come again... probably try something else when in London again. In general there are nicer places in Europe.

Sweatbox is at pains to market itself as different from other London saunas. In some respects it is. The crowd is generally younger and with regular parties featuring DJs and appearances by porn stars they do at least try harder than other venues. The choice of black paint and red lighting makes it hard to judge the quality of the fit out and cleanliness, but I think Pleasuredrome has a much higher spec fit out. If you get frustrated at the older and, to be brutally honest, sometimes seriously out of shape and slightly desperate patrons that other saunas can attract then Sweatbox may appeal, but the younger crowd can be more reticent. I don't think Sweatbox will really change anyone's perceptions of saunas, but if they appeal to you, this is worth checking out. One complaint is that the towels are made of synthetic materials rather than cotton. Also note that various types of passes (48 hour) are available and a small deposit is also required for your locker key.