I wouldn’t expect it to be mega busy mid afternoon but you never know who or how many guys you’ll find there during the week. But that being said is probably a good time to go if you’re going on your own. The atmosphere is fairly chilled and relaxed if guys are interested they will usually make fairly obvious eye contact with you or may chat to you interested he cafe or hot tub. don’t worry about blanking guys you’re not interested in that’s expected.
Don’t be shy about telling guys what your up for if you get that far…better to be up front about it. Hope you have a fab time