I'm trying to find a activity group in Marple that is ideal for 30-35 year olds - not to be rude but always find that a lot of groups in Marple are catered for those who have retired or school/college kids. I don't know how welcomed i would be as a new member - as some groups I've joined in the past I've found quite hostile. I don't drive so wondering outside Marple late at night is not an option.
PLEASE HELP IM GOING SPARE AT HOME! 
WI (get in there and change the age demographic from the inside - there's an afternoon branch in Marple Bridge and the new evening group in High Lane), the Carver Theatre (even if you aren't a keen actress, they are bound to bite your hand off if you want to be involved back stage), volunteer with Guides and Brownies. If you are a knitter or would like to become one the wool shop on Market Street hosts a group on Tuesday evenings. They range in age from students to retired ladies and the atmosphere is very welcoming. Marple library has a monthly reading discussion group and there is a notice board with useful info. Marple Ladies Luncheon Club is looking for new members. They meet 4 times a year for lunch at Marple Golf Club. There's a speaker after the meal and they're always very entertaining. The next lunch is in December. I can let you have the contact details if you like. Marple Arts Group offers a weekly programme of music, literature, drama, visual arts and film subjects on Thursday evenings from September to March.
Do you get the "Insider", the booklet that comes through the door at regular intervals? There is always a list of local activities in that.
Always give a new group a chance. What you are interpreting as hostility may be shyness or reticence on the part of other members or if they are committee members they may be trying to do six things at once and are a tad distracted.