In addition to being a hangout day or night for cruising and meeting other guys, working out, swimming (there are both indoor and outdoor pools), having cocktails with friends (there's a full bar open from 1 pm until 2:30), enjoying a bite to eat (food is served in the bar and cafe), Flex has a number of attractively furnished hotel rooms - they're pretty much on the level, in terms of decor and amenities, of a mid-range chain hotel, but with a bit more character. And, of course, you're in close proximity to plenty of friendly guys, if that's what you're up for. If not, it's still a perfectly solid option as an overnight accommodation, and it's by no means expected that you're here to hook up just because you book a room here. Overnight accommodations cost from $80 to $240 per night, and rooms range from standard single rooms to a quite large presidential suite.
Flex is members only, so you day visitors pay a small daily fee (more affordable six-month and annual memberships are also available and make sense if you're here for more than a few days) to join, and then rates for lockers, cabins, and such range from about $15 to $30 - all quite reasonable for such a modern and pleasant facility.
Flex Cleveland is part of a family of men's bathhouses around the country - there's another Flex a couple of hours away in Columbus, and other branches in Atlanta, Los Angeles, New Orleans, Miami, and Phoenix.