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Just do it (although keep in mind most evening 10s are starting to finish for the year).
I started doing my local club's evening 10 last year on my road bike and enjoyed it, coming more or less last each time.
This year knocked a minute of my PB and won the clubs handicap trophy. It's been a lot of fun, and the training and riding has made me loose weight and made me the fittest I've been for a while.
Yes, I should probably just try it. I know the roads well enough and it seems like a good part of the world to do it in (quite a few old trunk roads that now carry little traffic).