Kempton Park races - where to stay?

planning a stag do (over a weekend) and one of the days is going to be at Kempton. What I need to organise is a hotel for about 30 blokes. I imagine something like a travel lodge or similar would do the job, cheap and cheerful, somewhere to get your head down, but within easy striking distance of bars/clubs etc.

Where would you recommend we stay that has this lot and a rail link to Kempton Park?

Thanking you…