Qba

Qba is the closest you will get to a club in Haywards Heath. It used to open for just the evenings, but now serves food at lunchtime as well as drinks for the office crowd.
There is less seating here than the other Broadway bars, but you do get an area where the more mobile can have a dance. A decked patio is out back, which will usually be full on the weekend evenings. If you are in HH and out for the night, it may be best to get to Qba slightly earlier as it can get pretty busy later on. This can be especially painful regarding the toilets and you will see many a bored girl queuing for the limited facilities.
Drinks are what you would expect from a bar and they tend to push the Jäger bomb culture. Be warned though that your idea to be generous and buy a round in will set you back. Prices are at the top end of the broadway and most pints/​spirits and mixer will be coming in at over £3.
If I was going out I would make the effort to get to Brighton rather than end up in Qba, but for those less inclined to travel it serves a fair alternative. Music is certainly not upto Brighton/​London beats, but the local crowd seem to boogie away anyhow.