Waitresses in strip clubs can make a lot of tips whether they're topless or not. It's hard work, but if you're good at it it can be worth your while. The best strip club waitress I knew was also quite forward about suggesting customers tip her, which helped! I don't know what the London scene's like and there isn't a good UK forum any more, but you can try stripperweb.com.

As I understand it, drinking champagne with clients in hostess clubs is generally expected to lead to more with some of them. I did it in Denmark and that's how I got into escorting. My club made money by selling bottles of champagne at a huge premium, with 15% of the price going to the hostess. If the client bought enough champagne the hostess was allowed to leave with him. Obviously going out with clients made it easier to make money, but the club didn't require it and some girls at the club didn't do it. They still made enough to make it worth their while.

I believe hostess clubs in England have the same kind of extras involved, but I don't know if they're set up in such a way that you'd need to do it. You could try it and see what's expected, if you're good at sales you can make money in that sort of environment without getting too personal. You will have men expecting to be able to buy you though, so don't bother if that will upset you.