Really guys, it's sad we're looking forward to that and don't have a cool band to listen to this weekend. Perhaps I STILL don't know where to go.
Well there are bands which play here, but whether or not they're your cup of tea I don't know. A lot of bands I've heard in the past just do covers, there are local bands, some of whom are quite good but you have to know where to look - I can't really tell you though I'm afraid (I haven't been out and about in town for ages) but you must have done some searches about this kind of thing, looked on sites like 'Stomp' etc, asked questions on other forums (not necessarily expat forums).
The teeny tiny Home club along the river used to be an OK place for bands but I'm not even sure if it's still going (it was in the Riverwalk building). The Prince of Wales on Dunlop St has bands, the Crazy Elephant used to (is it even still there?). The Pump Room, the Highlander, some of those others down the river, even Lau Pa Sat used to sometimes have a band in the evenings (not a very good band but a band nonetheless

). There's also the Hard Rock - they often have bands on.
More well-known - Elton John, Scissor Sisters, Good Charlotte...........none of whom I like, but at least they're making the effort to come here.
Thing is, Singapore's a tiny place, I've known many bands over the years cancel due to poor ticket sales - they've got to know they're going to draw a big crowd to even bother coming and they usually only stop here en-route to somewhere more exciting which is why they play here on lame days of the week like Mondays.
But yes, there's definitely a niche in the market for a decent club with live bands playing which isn't necessarily a club for under 25 year olds.